m68k: fix typos in comments

Various spelling mistakes in comments.
Detected with the help of Coccinelle.

Signed-off-by: Julia Lawall <[e-mail]>
Reviewed-by: Geert Uytterhoeven <[e-mail]>
Signed-off-by: Greg Ungerer <[e-mail]>

arch/m68k/coldfire/intc.c

···
 unsigned char mcf_irq2imr[NR_IRQS];
 
 /*
- * Define the miniumun and maximum external interrupt numbers.
+ * Define the minimum and maximum external interrupt numbers.
  * This is also used as the "level" interrupt numbers.
  */
 #define	EIRQ1	25

arch/m68k/coldfire/m53xx.c

···
 		writel(readl(MCF_SDRAMC_SDCR) | MCF_SDRAMC_SDCR_CKE,
 			MCF_SDRAMC_SDCR);
 
-	/* Errata - workaround for SDRAM opeartion after exiting LIMP mode */
+	/* Errata - workaround for SDRAM operation after exiting LIMP mode */
 	writel(MCF_SDRAMC_REFRESH, MCF_SDRAMC_LIMP_FIX);
 
 	/* wait for DQS logic to relock */

arch/m68k/coldfire/pci.c

···
 static unsigned long iospace;
 
 /*
- * We need to be carefull probing on bus 0 (directly connected to host
+ * We need to be careful probing on bus 0 (directly connected to host
  * bridge). We should only access the well defined possible devices in
  * use, ignore aliases and the like.
  */