[ARM] Silence OMAP kernel configuration warning

arch/arm/mach-omap1/Kconfig:41:warning: 'select' used by config
 symbol 'MACH_OMAP_H3' refers to undefined symbol 'GPIOEXPANDER_OMAP'
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-omap1/Kconfig

@@ -38,7 +38,7 @@ config MACH_OMAP_H2
 config MACH_OMAP_H3
 	bool "TI H3 Support"
 	depends on ARCH_OMAP1 && ARCH_OMAP16XX
-	select GPIOEXPANDER_OMAP
+#	select GPIOEXPANDER_OMAP
     	help
 	  TI OMAP 1710 H3 board support. Say Y here if you have such
 	  a board.