bcm47xx: Refresh patches

Refresh patches to make them cleanly apply.
This problem  was found by the github CI.

Fixes: ecd9abc8c082 ("kernel: use upstream firmware patch for Broadcom's NVRAM")
Signed-off-by: Hauke Mehrtens <[email protected]>

target/linux/bcm47xx/patches-5.15/820-wgt634u-nvram-fix.patch

@@ -280,7 +280,7 @@ out the configuration than the in kernel cfe config reader.
  	/* TODO: when nvram is on nand flash check for bad blocks first. */
  
  	/* Try every possible flash size and check for NVRAM at its end */
-@@ -172,6 +194,13 @@ int bcm47xx_nvram_getenv(const char *nam
+@@ -190,6 +212,13 @@ int bcm47xx_nvram_getenv(const char *nam
  	if (!name)
  		return -EINVAL;