brcm47xx: read sprom vars without prefix for boardrev and boardtype if the prefixed one is not available.

SVN-Revision: 34454

target/linux/brcm47xx/patches-3.6/200-MIPS-BCM47XX-use-fallback-for-some-board.patch

@@ -0,0 +1,17 @@
+--- a/arch/mips/bcm47xx/sprom.c
++++ b/arch/mips/bcm47xx/sprom.c
+@@ -652,12 +652,10 @@ static void bcm47xx_fill_sprom_ethernet(
+ static void bcm47xx_fill_board_data(struct ssb_sprom *sprom, const char *prefix,
+ 				    bool fallback)
+ {
+-	nvram_read_u16(prefix, NULL, "boardrev", &sprom->board_rev, 0,
+-		       fallback);
++	nvram_read_u16(prefix, NULL, "boardrev", &sprom->board_rev, 0, true);
+ 	nvram_read_u16(prefix, NULL, "boardnum", &sprom->board_num, 0,
+ 		       fallback);
+-	nvram_read_u16(prefix, NULL, "boardtype", &sprom->board_type, 0,
+-		       fallback);
++	nvram_read_u16(prefix, NULL, "boardtype", &sprom->board_type, 0, true);
+ 	nvram_read_u32_2(prefix, "boardflags", &sprom->boardflags_lo,
+ 			 &sprom->boardflags_hi, fallback);
+ 	nvram_read_u32_2(prefix, "boardflags2", &sprom->boardflags2_lo,