ARM: DRA: Enable VTT regulator

DRA7 evm REV G and later boards uses a vtt regulator for DDR3 termination
and this is controlled by gpio7_11. Configuring gpio7_11.
The pad A22(offset 0x3b4) is used by gpio7_11 on REV G and later boards,
and left unused on previous boards, so it is safe enough to enable gpio
on all DRA7 boards.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>

arch/arm/cpu/armv7/omap-common/hwinit-common.c

@@ -140,6 +140,9 @@ void s_init(void)
 #endif
 	prcm_init();
 #ifdef CONFIG_SPL_BUILD
+#ifdef CONFIG_BOARD_EARLY_INIT_F
+	board_early_init_f();
+#endif
 	/* For regular u-boot sdram_init() is called from dram_init() */
 	sdram_init();
 #endif