Blackfin arch: Advertise GENERIC_GPIO and remove duplicated GENERIC_CALIBRATE_DELAY

Signed-off-by: NMichael Hennerich <michael.hennerich@analog.com>
Signed-off-by: NBryan Wu <bryan.wu@analog.com>

arch/blackfin/Kconfig

@@ -57,7 +57,7 @@ config GENERIC_TIME
 	bool
 	default n
 
-config GENERIC_CALIBRATE_DELAY
+config GENERIC_GPIO
 	bool
 	default y