pxe: support linux entries for labels

Kernels can be specified using "linux" or "kernel" entry. The difference
is kernel is supposed to detect the type of file, but for u-boot both are
treated the same.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>

common/cmd_pxe.c

@@ -628,6 +628,7 @@ enum token_type {
 	T_TIMEOUT,
 	T_LABEL,
 	T_KERNEL,
+	T_LINUX,
 	T_APPEND,
 	T_INITRD,
 	T_LOCALBOOT,
@@ -656,6 +657,7 @@ static const struct token keywords[] = {
 	{"prompt", T_PROMPT},
 	{"label", T_LABEL},
 	{"kernel", T_KERNEL},
+	{"linux", T_LINUX},
 	{"localboot", T_LOCALBOOT},
 	{"append", T_APPEND},
 	{"initrd", T_INITRD},
@@ -1024,6 +1026,7 @@ static int parse_label(char **c, struct pxe_menu *cfg)
 			break;
 
 		case T_KERNEL:
+		case T_LINUX:
 			err = parse_sliteral(c, &label->kernel);
 			break;