staging: brcm80211: move another file only used by brcmsmac into appropriate dir

nvram functions are only needed by brcmsmac.

Cc: devel@linuxdriverproject.org
Cc: linux-wireless@vger.kernel.org
Reviewed-by: Brett Rudley <brudley@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/brcm80211/brcmsmac/Makefile

@@ -53,7 +53,7 @@ BRCMSMAC_OFILES := \
 	nicpci.o \
 	../util/bcmutils.o \
 	../util/bcmwifi.o \
-	../util/nvram/nvram_ro.o
+	nvram.o
 
 MODULEPFX := brcmsmac