Add PS2_MOUSE_ROTATE to compensate for device orientation (qmk#8650)

* Add PS2_MOUSE_ROTATE to compensate for device orientation

* fixup! Add PS2_MOUSE_ROTATE to compensate for device orientation

* Reformat with IndentPPDirectives: AfterHash as per qmk#6316

tmk_core/protocol/ps2_mouse.c

@@ -157,6 +157,21 @@ static inline void ps2_mouse_convert_report_to_hid(report_mouse_t *mouse_report)
     // invert coordinate of y to conform to USB HID mouse
     mouse_report->y = -mouse_report->y;
 #endif
+
+#ifdef PS2_MOUSE_ROTATE
+    int8_t x = mouse_report->x;
+    int8_t y = mouse_report->y;
+#    if PS2_MOUSE_ROTATE == 90
+    mouse_report->x = y;
+    mouse_report->y = -x;
+#    elif PS2_MOUSE_ROTATE == 180
+    mouse_report->x = -x;
+    mouse_report->y = -y;
+#    elif PS2_MOUSE_ROTATE == 270
+    mouse_report->x = -y;
+    mouse_report->y = x;
+#    endif
+#endif
 }
 
 static inline void ps2_mouse_clear_report(report_mouse_t *mouse_report) {