[Kernel] Kernel-mode graphics uses macro to find remapped physical framebuffer address

Author: codyd51

kernel/gfx/lib/gfx.c

@@ -203,7 +203,7 @@ void kernel_gfx_write_line_rendered_string_ex(char* str, bool higher_half) {
     framebuffer_info_t fb = b->framebuffer;
     uint64_t addr = fb.address;
     if (higher_half) {
-        addr += KERNEL_MEMORY_BASE;
+        addr = PMA_TO_VMA(addr);
     }
 
     Point end_cursor = kernel_gfx_draw_string((uint8_t*)addr, str, _g_cursor, color_white(), _g_font_size);