[console] Allow for named keyboard mappings

Separate the concept of a keyboard mapping from a list of remapped
keys, to allow for the possibility of supporting multiple keyboard
mappings at runtime.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/hci/keymap/keymap_mk.c

@@ -10,8 +10,15 @@ FILE_LICENCE ( PUBLIC_DOMAIN );
 
 #include <ipxe/keymap.h>
 
-/** "mk" keyboard mapping */
-struct key_mapping mk_mapping[] __keymap = {
+/** "mk" basic remapping */
+static struct keymap_key mk_basic[] = {
 	{ 0xdc, 0x3c },	/* Pseudo-'\\' => '<' */
 	{ 0xfc, 0x3e },	/* Pseudo-'|' => '>' */
+	{ 0, 0 }
+};
+
+/** "mk" keyboard map */
+struct keymap mk_keymap __keymap = {
+	.name = "mk",
+	.basic = mk_basic,
 };