ARM: mach-omap2: gpmc: Fix warning when CONFIG_ARM_LPAE=y

When CONFIG_ARM_LPAE=y the following build warning is generated:

arch/arm/mach-omap2/gpmc.c:1495:4: warning: format '%x' expects argument of type 'unsigned int', but argument 4 has type 'resource_size_t' [-Wformat]

According to Documentation/printk-formats.txt '%pa' can be used to properly
print 'resource_size_t'.

Reported-by: Kevin Hilman <khilman@linaro.org>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Kevin Hilman <khilman@linaro.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>