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, 28 deletions

diff --git a/target/linux/generic/backport-5.4/042-v5.5-arm64-csum-Fix-pathological-zero-length-calls.patch b/target/linux/generic/backport-5.4/042-v5.5-arm64-csum-Fix-pathological-zero-length-calls.patch
deleted file mode 100644
index 50b210e14f..0000000000
--- a/target/linux/generic/backport-5.4/042-v5.5-arm64-csum-Fix-pathological-zero-length-calls.patch
+++ /dev/null
@@ -1,28 +0,0 @@
-From: Robin Murphy <robin.murphy@arm.com>
-Date: Fri, 17 Jan 2020 15:48:39 +0000
-Subject: [PATCH] arm64: csum: Fix pathological zero-length calls
-
-In validating the checksumming results of the new routine, I sadly
-neglected to test its not-checksumming results. Thus it slipped through
-that the one case where @buff is already dword-aligned and @len = 0
-manages to defeat the tail-masking logic and behave as if @len = 8.
-For a zero length it doesn't make much sense to deference @buff anyway,
-so just add an early return (which has essentially zero impact on
-performance).
-
-Signed-off-by: Robin Murphy <robin.murphy@arm.com>
-Signed-off-by: Will Deacon <will@kernel.org>
----
-
---- a/arch/arm64/lib/csum.c
-+++ b/arch/arm64/lib/csum.c
-@@ -20,6 +20,9 @@ unsigned int do_csum(const unsigned char
- 	const u64 *ptr;
- 	u64 data, sum64 = 0;
- 
-+	if (unlikely(len == 0))
-+		return 0;
-+
- 	offset = (unsigned long)buff & 7;
- 	/*
- 	 * This is to all intents and purposes safe, since rounding down cannot