Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/net/wireless/Makefile b/net/wireless/Makefile
index 1d84f91..2eee939 100644
--- a/net/wireless/Makefile
+++ b/net/wireless/Makefile
@@ -12,6 +12,7 @@
 
 cfg80211-y += core.o sysfs.o radiotap.o util.o reg.o scan.o nl80211.o
 cfg80211-y += mlme.o ibss.o sme.o chan.o ethtool.o mesh.o ap.o trace.o ocb.o
+cfg80211-y += pmsr.o
 cfg80211-$(CONFIG_OF) += of.o
 cfg80211-$(CONFIG_CFG80211_DEBUGFS) += debugfs.o
 cfg80211-$(CONFIG_CFG80211_WEXT) += wext-compat.o wext-sme.o
@@ -38,6 +39,7 @@
 	@(set -e; \
 	  allf=""; \
 	  for f in $^ ; do \
+	      test -f $$f || continue;\
 	      # similar to hexdump -v -e '1/1 "0x%.2x," "\n"' \
 	      thisf=$$(od -An -v -tx1 < $$f | \
 	                   sed -e 's/ /\n/g' | \