m68k: mcfgpio: Fix incorrect register offset for CONFIG_M5441x

Fix a typo in the CONFIG_M5441x preprocessor condition, where the GPIO
register offset was incorrectly set to 8 instead of 0. This prevented
proper GPIO configuration for m5441x targets.

Fixes: bea8bcb ("m68knommu: Add support for the Coldfire m5441x.")
Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@yoseli.org>
Signed-off-by: Greg Ungerer <gerg@kernel.org>

Author: Jean-Michel Hautbois

arch/m68k/include/asm/mcfgpio.h

@@ -136,7 +136,7 @@ static inline void gpio_free(unsigned gpio)
  * read-modify-write as well as those controlled by the EPORT and GPIO modules.
  */
 #define MCFGPIO_SCR_START		40
-#elif defined(CONFIGM5441x)
+#elif defined(CONFIG_M5441x)
 /* The m5441x EPORT doesn't have its own GPIO port, uses PORT C */
 #define MCFGPIO_SCR_START		0
 #else