dt: Remove dangling "select PROC_DEVICETREE"

CONFIG_PROC_DEVICETREE has been removed from the tree. This commit
removes a dangling select of the config symbol.
Signed-off-by: NGrant Likely <grant.likely@linaro.org>
Cc: Paul Bolle <pebolle@tiscali.nl>
Cc: Rob Herring <rob.herring@linaro.org>

arch/arm/mach-omap2/Kconfig

@@ -104,7 +104,6 @@ config ARCH_OMAP2PLUS
 	select MACH_OMAP_GENERIC
 	select OMAP_DM_TIMER
 	select PINCTRL
-	select PROC_DEVICETREE if PROC_FS
 	select SOC_BUS
 	select SPARSE_IRQ
 	select TI_PRIV_EDMA