powerpc: Various typo fixes under arch/powerpc/cpu/mpc83xx

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
diff --git a/arch/powerpc/cpu/mpc83xx/qe_io.c b/arch/powerpc/cpu/mpc83xx/qe_io.c
index 4fae19c..106704d 100644
--- a/arch/powerpc/cpu/mpc83xx/qe_io.c
+++ b/arch/powerpc/cpu/mpc83xx/qe_io.c
@@ -23,7 +23,7 @@
 	volatile immap_t	*im = (volatile immap_t *)CONFIG_SYS_IMMR;
 	volatile qepio83xx_t	*par_io = (volatile qepio83xx_t *)&im->qepio;
 
-	/* Caculate pin location and 2bit mask and dir */
+	/* Calculate pin location and 2bit mask and dir */
 	pin_2bit_mask = (u32)(0x3 << (NUM_OF_PINS-(pin%(NUM_OF_PINS/2)+1)*2));
 	pin_2bit_dir = (u32)(dir << (NUM_OF_PINS-(pin%(NUM_OF_PINS/2)+1)*2));