CRIS: Drop code related to obsolete or unused kconfigs

Drop all code related to Kconfigs that don't exist.
Fix one Kconfig where it was actually typo:ed (ETRAX_KGB_PORT2)
Drop content related to CRIS v32 SoCs from etraxgpio.h headerfile,
all use of GPIO for both ETRAX FS and ARTPEC-3 should now be through
standard gpiolib instead.

Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>

arch/cris/boot/rescue/head_v10.S

@@ -281,9 +281,6 @@ wait_ser:
 #ifdef CONFIG_ETRAX_PB_LEDS
 	move.b	$r2, [R_PORT_PB_DATA]
 #endif
-#ifdef CONFIG_ETRAX_90000000_LEDS
-	move.b	$r2, [0x90000000]
-#endif
 #endif
 
 	;; check if we got something on the serial port