powerpc/simpleboot: fix comment

Signed-off-by: Geert Uytterhoeven <[e-mail]>
Cc: Benjamin Herrenschmidt <[e-mail]>
Cc: [e-mail]
Signed-off-by: Jiri Kosina <[e-mail]>

arch/powerpc/boot/simpleboot.c

···
 		if (*reg++ != 0)
 			fatal("Memory range is not based at address 0\n");
 
-	/* get the memsize and trucate it to under 4G on 32 bit machines */
+	/* get the memsize and truncate it to under 4G on 32 bit machines */
 	memsize64 = 0;
 	for (i = 0; i < *ns; i++)
 		memsize64 = (memsize64 << 32) | *reg++;