Add SN74x154 driver and convert AL1 custom matrix (#16331)

keyboards/al1/config.h

@@ -30,6 +30,11 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MATRIX_ROWS 6
 #define MATRIX_COLS 16
 
+#define MATRIX_ROW_PINS { C7, B1, B2, C6, B4, B5 }
+
+#define SN74X154_ADDRESS_PINS { D4, D5, D6, D7 }
+#define SN74X154_E1_PIN D3
+
 #define LED_NUM_LOCK_PIN D0
 #define LED_CAPS_LOCK_PIN B7
 #define LED_SCROLL_LOCK_PIN D1