[console] Include mappings for AltGr-Shift-<key>

The BIOS console's interpretation of LShift+RShift as equivalent to
AltGr requires the shifted ASCII characters to be present in the AltGr
mapping table, to allow AltGr-Shift-<key> to be interpreted in the
same way as AltGr-<key>.

For keyboard layouts that have different ASCII characters for
AltGr-<key> and AltGr-Shift-<key>, this will potentially leave the
character for AltGr-<key> inaccessible via the BIOS console if the
BIOS requires the use of the LShift+RShift workaround.  This
theoretically affects the numeric keys in the Lithuanian ("lt")
keyboard layout (where the numerals are accessed via AltGr-<key> and
punctuation characters via AltGr-Shift-<key>), but the simple
workaround for that keyboard layout is to avoid using AltGr and Shift
entirely since the unmodified numeric keys are not remapped anyway.

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

src/hci/keymap/keymap_pt.c

@@ -40,11 +40,16 @@ static struct keymap_key pt_basic[] = {
 
 /** "pt" AltGr remapping */
 static struct keymap_key pt_altgr[] = {
+	{ 0x26, 0x7b },	/* '&' => '{' */
+	{ 0x28, 0x5d },	/* '(' => ']' */
+	{ 0x29, 0x7d },	/* ')' => '}' */
+	{ 0x2a, 0x5b },	/* '*' => '[' */
 	{ 0x30, 0x7d },	/* '0' => '}' */
 	{ 0x32, 0x40 },	/* '2' => '@' */
 	{ 0x37, 0x7b },	/* '7' => '{' */
 	{ 0x38, 0x5b },	/* '8' => '[' */
 	{ 0x39, 0x5d },	/* '9' => ']' */
+	{ 0x51, 0x40 },	/* 'Q' => '@' */
 	{ 0x71, 0x40 },	/* 'q' => '@' */
 	{ 0, 0 }
 };