kernel: delete Linux 5.4 config and patches

As the upcoming release will be based on Linux 5.10 only, remove all
kernel configuration as well as patches for Linux 5.4.
There were no targets still actively using Linux 5.4.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
(cherry picked from commit 3a14580411adfb75f9a44eded9f41245b9e44606)

1 files changed, 0 insertions, 67 deletions

diff --git a/target/linux/generic/backport-5.4/816-v5.8-i2c-pxa-avoid-complaints-with-non-responsive-slaves.patch b/target/linux/generic/backport-5.4/816-v5.8-i2c-pxa-avoid-complaints-with-non-responsive-slaves.patch
deleted file mode 100644
index 63e6db80ad..0000000000
--- a/target/linux/generic/backport-5.4/816-v5.8-i2c-pxa-avoid-complaints-with-non-responsive-slaves.patch
+++ /dev/null
@@ -1,67 +0,0 @@
-From: Russell King <rmk+kernel@armlinux.org.uk>
-Bcc: linux@mail.armlinux.org.uk
-Subject: [PATCH 2/7] i2c: pxa: avoid complaints with non-responsive slaves
-MIME-Version: 1.0
-Content-Disposition: inline
-Content-Transfer-Encoding: 8bit
-Content-Type: text/plain; charset="utf-8"
-
-Running i2cdetect on a PXA I2C adapter is very noisy; it complains
-whenever a slave fails to respond to the address cycle.  Since it is
-normal to probe for slaves in this way, we should not fill the kernel
-log.  This is especially true with SFP modules that take a while to
-respond on the I2C bus, and probing via the I2C bus is the only way to
-detect that they are ready.
-
-Fix this by changing the internal transfer return code from I2C_RETRY
-to a new NO_SLAVE code (mapped to -ENXIO, as per the I2C documentation
-for this condition, but we still return -EREMOTEIO to the I2C stack to
-maintain long established driver behaviour.)
-
-Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
----
- drivers/i2c/busses/i2c-pxa.c | 12 ++++++++----
- 1 file changed, 8 insertions(+), 4 deletions(-)
-
---- a/drivers/i2c/busses/i2c-pxa.c
-+++ b/drivers/i2c/busses/i2c-pxa.c
-@@ -91,6 +91,7 @@
-  */
- #define DEF_TIMEOUT             32
- 
-+#define NO_SLAVE		(-ENXIO)
- #define BUS_ERROR               (-EREMOTEIO)
- #define XFER_NAKED              (-ECONNREFUSED)
- #define I2C_RETRY               (-2000) /* an error has occurred retry transmit */
-@@ -838,7 +839,7 @@ static void i2c_pxa_irq_txempty(struct p
- 		 */
- 		if (isr & ISR_ACKNAK) {
- 			if (i2c->msg_ptr == 0 && i2c->msg_idx == 0)
--				ret = I2C_RETRY;
-+				ret = NO_SLAVE;
- 			else
- 				ret = XFER_NAKED;
- 		}
-@@ -1066,16 +1067,19 @@ static int i2c_pxa_internal_xfer(struct
- {
- 	int ret, i;
- 
--	for (i = i2c->adap.retries; i >= 0; i--) {
-+	for (i = 0; ; ) {
- 		ret = xfer(i2c, msgs, num);
--		if (ret != I2C_RETRY)
-+		if (ret != I2C_RETRY && ret != NO_SLAVE)
- 			goto out;
-+		if (++i >= i2c->adap.retries)
-+			break;
- 
- 		if (i2c_debug)
- 			dev_dbg(&i2c->adap.dev, "Retrying transmission\n");
- 		udelay(100);
- 	}
--	i2c_pxa_scream_blue_murder(i2c, "exhausted retries");
-+	if (ret != NO_SLAVE)
-+		i2c_pxa_scream_blue_murder(i2c, "exhausted retries");
- 	ret = -EREMOTEIO;
-  out:
- 	i2c_pxa_set_slave(i2c, ret);