util/intelmetool: Be explicit about *kernel* cmdline arguments

Reduce the potential for confusion.

Change-Id: I1d5df9acb30948f786f4ced895bbaeed80153fdb
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Reviewed-on: https://review.coreboot.org/25699
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

util/intelmetool/me.c

@@ -583,7 +583,7 @@ uint32_t intel_mei_setup(struct pci_dev *dev)
 	mei_mmap += mei_base_address - pagerounded;
 	if (mei_mmap == NULL) {
 		printf("Could not map ME setup memory.\n"
-		       "Do you have cmdline argument 'iomem=relaxed' set ?\n");
+		       "Do you have kernel cmdline argument 'iomem=relaxed' set ?\n");
 		return 1;
 	}