powerpc/pixis: Fix pixis help message

"pixis_reset help" command prints the message without a new line "\n",
which makes the prompt on the same line.

Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>

board/freescale/common/pixis.c

@@ -480,6 +480,7 @@ static int pixis_reset_cmd(cmd_tbl_t *cmdtp, int flag, int argc, char * const ar
 	    ||	unknown_param) {
 #ifdef CONFIG_SYS_LONGHELP
 		puts(cmdtp->help);
+		putc('\n');
 #endif
 		return 1;
 	}
@@ -512,6 +513,7 @@ static int pixis_reset_cmd(cmd_tbl_t *cmdtp, int flag, int argc, char * const ar
 		      && set_px_mpxpll(mpxpll))) {
 #ifdef CONFIG_SYS_LONGHELP
 			puts(cmdtp->help);
+			putc('\n');
 #endif
 			return 1;
 		}