bcm63xx: prevent fall-through in kernel patches for 5.4

In kernel 5.4 -Werror=implicit-fallthrough is treated as error:

arch/mips/bcm63xx/cpu.c: In function 'detect_cpu_clock':
arch/mips/bcm63xx/cpu.c:158:2: error: this statement may fall through [-Werror=implicit-fallthrough=]
  {
  ^
arch/mips/bcm63xx/cpu.c:179:2: note: here
  case BCM6328_CPU_ID:
  ^~~~
cc1: all warnings being treated as errors

This can be fixed by adding "Fall through" as a comment where intended,
and has to be fixed by returning a proper default otherwise.

In case of the default clock frequency for BCM6318 we fixed this by
returning the default value taken from BCM6328 and BCM6362.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

1 files changed, 2 insertions, 1 deletions

diff --git a/target/linux/bcm63xx/patches-5.4/416-BCM63XX-add-a-fixup-for-ath9k-devices.patch b/target/linux/bcm63xx/patches-5.4/416-BCM63XX-add-a-fixup-for-ath9k-devices.patch
index c9d2ee1791..d83d2cec7b 100644
--- a/target/linux/bcm63xx/patches-5.4/416-BCM63XX-add-a-fixup-for-ath9k-devices.patch
+++ b/target/linux/bcm63xx/patches-5.4/416-BCM63XX-add-a-fixup-for-ath9k-devices.patch
@@ -24,7 +24,7 @@ Subject: [PATCH 61/72] BCM63XX: add a fixup for ath9k devices
  obj-y		+= boards/
 --- /dev/null
 +++ b/arch/mips/bcm63xx/pci-ath9k-fixup.c
-@@ -0,0 +1,200 @@
+@@ -0,0 +1,201 @@
 +/*
 + *  Broadcom BCM63XX Ath9k EEPROM fixup helper.
 + *
@@ -108,6 +108,7 @@ Subject: [PATCH 61/72] BCM63XX: add a fixup for ath9k devices
 +			return eeprom;
 +		}
 +		/* can't do anything here without talking to the SPI controller. */
++		/* Fall through */
 +	case BCM63XX_FLASH_TYPE_NAND:
 +	default:
 +		return NULL;