ap51-flash: Remove OFLAGS from MAKE_FLAGS

Nothing in ap51-flash is using the variable OFLAGS. It should therefore not
be set.

Signed-off-by: Sven Eckelmann <sven@narfation.org>

utils/ap51-flash/Makefile

@@ -31,7 +31,6 @@ TARGET_EXTRA_CFLAGS:=-DFLASH_FROM_FILE -DNO_LIBPCAP -D_GNU_SOURCE
 
 # pass optimization flags
 MAKE_FLAGS += \
-	OFLAGS="$(TARGET_CFLAGS)" \
 	EXTRA_CFLAGS="$(TARGET_EXTRA_CFLAGS)" \
 	REVISION="$(PKG_VERSION)" \
 	ap51-flash