ARM: mach-omap2: omap3: Fix GPIO clocking in SPL

OMAP3_GPIO_x is needed to enable each GPIO bank on the OMAP3
boards. At one point, the #ifdef's were replaced with
if CONFIG_IS_ENABLED but this won't work for people who need
OMAP3_GPIO_x in SPL since the SPL prefix for this option isn't
used in Kconfig.  This patch moves the check to #if defined and
also makes Kconfig select the banks if CMD_GPIO is used which
makes the checks in the code less cumbersome.

Fixes: bd8a9c14c91c ("arm: mach-omap2/omap3/clock.c: Enable
all GPIO with CMD_GPIO")

Reported-by: Liam O'Shaughnessy <liam.o.shaughnessy@gumstix.com>
Signed-off-by: Adam Ford <aford173@gmail.com>
[trini: Migrate omap3_igep00x0.h]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/arm/mach-omap2/omap3/Kconfig b/arch/arm/mach-omap2/omap3/Kconfig
index e0d02fb..0286b0d 100644
--- a/arch/arm/mach-omap2/omap3/Kconfig
+++ b/arch/arm/mach-omap2/omap3/Kconfig
@@ -3,18 +3,23 @@
 # We only enable the clocks for the GPIO banks that a given board requies.
 config OMAP3_GPIO_2
 	bool
+	default y if CMD_GPIO
 
 config OMAP3_GPIO_3
 	bool
+	default y if CMD_GPIO
 
 config OMAP3_GPIO_4
 	bool
+	default y if CMD_GPIO
 
 config OMAP3_GPIO_5
 	bool
+	default y if CMD_GPIO
 
 config OMAP3_GPIO_6
 	bool
+	default y if CMD_GPIO
 
 choice
 	prompt "OMAP3 board select"