configs: omap35_logic_somlv: Fix MMC booting

A previous patch had removed the GPIO nodes from being built
into the SPL Device tree, but CONFIG_SPL_GPIO_SUPPORT remained
which makes the MMC card detect fail and the board does not boot.
Fix this by disabling CONFIG_SPL_GPIO_SUPPORT.

Fixes: 6f1efe81aa84 ("configs: omap3/35_logic and omap3/35_logic_somlv: Reduce SPL size")
Signed-off-by: Adam Ford <aford173@gmail.com>
diff --git a/configs/omap35_logic_somlv_defconfig b/configs/omap35_logic_somlv_defconfig
index e6655c7..a8eab40 100644
--- a/configs/omap35_logic_somlv_defconfig
+++ b/configs/omap35_logic_somlv_defconfig
@@ -4,6 +4,7 @@
 CONFIG_ARCH_OMAP2PLUS=y
 CONFIG_SYS_TEXT_BASE=0x80100000
 CONFIG_TI_COMMON_CMD_OPTIONS=y
+# CONFIG_SPL_GPIO_SUPPORT is not set
 CONFIG_SYS_MALLOC_F_LEN=0x4000
 CONFIG_NR_DRAM_BANKS=2
 CONFIG_SPL_TEXT_BASE=0x40200000