mx6: Fix get_board_rev() for the mx6 solo case

When booting a Freescale kernel 3.0.35 on a Wandboard solo, the get_board_rev()
returns 0x62xxx, which is not a value understood by the VPU
(Video Processing Unit) library in the kernel and causes the video playback to
fail.

The expected values for get_board_rev are:
0x63xxx: For mx6quad/dual
0x61xxx: For mx6dual-lite/solo

So adjust get_board_rev() accordingly and make it as weak function, so that we
do not need to define it in every mx6 board file.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Dirk Behme <dirk.behme@de.bosch.com>
Acked-by: Eric Nelson <eric.nelson@boundarydevices.com>

arch/arm/cpu/armv7/mx6/soc.c

@@ -61,6 +61,18 @@ u32 get_cpu_rev(void)
 	return (type << 12) | (reg + 0x10);
 }
 
+#ifdef CONFIG_REVISION_TAG
+u32 __weak get_board_rev(void)
+{
+	u32 cpurev = get_cpu_rev();
+	u32 type = ((cpurev >> 12) & 0xff);
+	if (type == MXC_CPU_MX6SOLO)
+		cpurev = (MXC_CPU_MX6DL) << 12 | (cpurev & 0xFFF);
+
+	return cpurev;
+}
+#endif
+
 void init_aips(void)
 {
 	struct aipstz_regs *aips1, *aips2;

board/boundary/nitrogen6x/nitrogen6x.c

@@ -331,11 +331,6 @@ int board_mmc_init(bd_t *bis)
 }
 #endif
 
-u32 get_board_rev(void)
-{
-	return 0x63000;
-}
-
 #ifdef CONFIG_MXC_SPI
 iomux_v3_cfg_t const ecspi1_pads[] = {
 	/* SS1 */

board/freescale/mx6qsabrelite/mx6qsabrelite.c

@@ -301,11 +301,6 @@ int board_mmc_init(bd_t *bis)
 }
 #endif
 
-u32 get_board_rev(void)
-{
-	return 0x63000 ;
-}
-
 #ifdef CONFIG_MXC_SPI
 iomux_v3_cfg_t const ecspi1_pads[] = {
 	/* SS1 */

board/freescale/mx6qsabresd/mx6qsabresd.c

@@ -254,11 +254,6 @@ int board_eth_init(bd_t *bis)
 	return 0;
 }
 
-u32 get_board_rev(void)
-{
-	return 0x63000;
-}
-
 int board_early_init_f(void)
 {
 	setup_iomux_uart();

board/wandboard/wandboard.c

@@ -170,11 +170,6 @@ int board_init(void)
 	return 0;
 }
 
-u32 get_board_rev(void)
-{
-	return get_cpu_rev();
-}
-
 int checkboard(void)
 {
 	puts("Board: Wandboard\n");