ARM: OMAP: GPIO: Fix valid range and enable usage of all GPIOs on OMAP5

The omap_gpio driver is used by AM33XX, OMAP3/4, OMAP54XX and DRA7XX SoCs.
These SoCs have different gpio count but currently omap_gpio driver uses hard
coded 192 which is wrong.

This patch fixes this issue by:
1. Move define of OMAP_MAX_GPIO to all arch/arm/include/asm/arch-omap*/gpio.h.
2. Update gpio bank settings and enable GPIO modules 7 & 8 clocks for OMAP5.

Thanks for Lubomir Popov to provide valuable comments to fix this issue.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Tested-by: Lubomir Popov <lpopov@mm-sol.com>
Acked-by: Heiko Schocher <hs@denx.de>
diff --git a/arch/arm/cpu/armv7/omap5/hw_data.c b/arch/arm/cpu/armv7/omap5/hw_data.c
index 56cf1f8..07b1108 100644
--- a/arch/arm/cpu/armv7/omap5/hw_data.c
+++ b/arch/arm/cpu/armv7/omap5/hw_data.c
@@ -412,6 +412,8 @@
 		(*prcm)->cm_l4per_gpio4_clkctrl,
 		(*prcm)->cm_l4per_gpio5_clkctrl,
 		(*prcm)->cm_l4per_gpio6_clkctrl,
+		(*prcm)->cm_l4per_gpio7_clkctrl,
+		(*prcm)->cm_l4per_gpio8_clkctrl,
 		0
 	};