[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_mt.c

@@ -10,11 +10,18 @@ FILE_LICENCE ( PUBLIC_DOMAIN );
 
 #include <ipxe/keymap.h>
 
-/** "mt" keyboard mapping */
-struct key_mapping mt_mapping[] __keymap = {
+/** "mt" basic remapping */
+static struct keymap_key mt_basic[] = {
 	{ 0x1c, 0x1e },	/* 0x1c => 0x1e */
 	{ 0x22, 0x40 },	/* '"' => '@' */
 	{ 0x40, 0x22 },	/* '@' => '"' */
 	{ 0x5c, 0x23 },	/* '\\' => '#' */
 	{ 0x7c, 0x7e },	/* '|' => '~' */
+	{ 0, 0 }
+};
+
+/** "mt" keyboard map */
+struct keymap mt_keymap __keymap = {
+	.name = "mt",
+	.basic = mt_basic,
 };