restore the dvi patch to support for DVI output

Targets/Bonito3a780e/Bonito/vgarom.c

@@ -1,4 +1,4 @@
-unsigned char vgarom[]={
+char vgarom[]={
 /*00000000:*/0x55,0xaa,0x76,0xe9,0x0d,0x02,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 /*00000010:*/0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xc0,0x01,0x00,0x00,0x00,0x00,0x49,0x42,
 /*00000020:*/0x4d,0xb1,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x04,
@@ -2830,9 +2830,9 @@ unsigned char vgarom[]={
 /*0000b0c0:*/0x66,0x00,0x00,0x00,0x04,0x31,0x77,0x00,0x7d,0x00,0x00,0x00,0x10,0x31,0x92,0x00,
 /*0000b0d0:*/0x98,0x00,0x00,0x00,0x10,0x32,0xb7,0x00,0xbd,0x00,0x00,0x00,0x01,0x15,0x21,0x00,
 /*0000b0e0:*/0x00,0x00,0x01,0x04,0x90,0x00,0x04,0x0c,0x01,0x00,0x00,0x01,0x00,0x00,0x01,0x00,
-/*0000b0f0:*/0x00,0x00,0xff,0x01,0x1f,0x21,0x00,0x00,0x00,0x01,0x04,0x92,0x00,0x02,0x04,0x08,
+/*0000b0f0:*/0x00,0x00,0xff,0x01,0x1f,0x21,0x00,0x00,0x00,0x01,0x04,0x91,0x00,0x02,0x04,0x08,
 /*0000b100:*/0x00,0x04,0x0c,0x01,0x00,0x30,0x02,0x00,0x00,0x00,0x02,0x00,0x00,0xff,0x01,0x1e,
-/*0000b110:*/0x21,0x00,0x00,0x00,0x01,0x04,0x91,0x40,0x01,0x04,0x92,0x00,0x02,0x04,0x06,0x00,
+/*0000b110:*/0x21,0x00,0x00,0x00,0x01,0x04,0x92,0x40,0x01,0x04,0x92,0x00,0x02,0x04,0x06,0x00,
 /*0000b120:*/0x09,0x06,0x00,0x01,0x02,0x00,0x04,0x0c,0x01,0x00,0x10,0x02,0x00,0x00,0x08,0x00,
 /*0000b130:*/0x00,0x00,0xff,0x01,0x1e,0x22,0x00,0x00,0x00,0x01,0x04,0x93,0x00,0x01,0x04,0x92,
 /*0000b140:*/0x40,0x09,0x06,0x00,0x01,0x02,0x00,0x04,0x0c,0x01,0x00,0x20,0x02,0x00,0x00,0x80,