metag: remove ARCH_WANT_OPTIONAL_GPIOLIB

This symbols is not needed to get access to selecting the
GPIOLIB anymore: any arch can select GPIOLIB.

Cc: Michael Büsch <[e-mail]>
Cc: [e-mail]
Acked-by: James Hogan <[e-mail]>
Signed-off-by: Linus Walleij <[e-mail]>

arch/metag/Kconfig.soc

···
 
 config SOC_TZ1090
 	bool "Toumaz Xenif TZ1090 SoC (Comet)"
-	select ARCH_WANT_OPTIONAL_GPIOLIB
 	select IMGPDC_IRQ
 	select METAG_LNKGET_AROUND_CACHE
 	select METAG_META21