Add uart2 test program

Reads input from uart and then writes it back out again immediately.

hw/efinix_fpga/ip/bram/bram_ini.vh

@@ -4,8 +4,8 @@ input integer index;//Mode type
 input integer val_; //Port A index, Port B Index, Number of Items in Loop, Port A Start, Port B Start, reserved 
 case (index)
    0: bram_ini_table=
-(val_== 0)?256'h006500048000fd00080000cb000ef000e60008d000ff0000b000bd00000000a2:
-(val_== 1)?256'h0000000000021000640006c000720006f00077000200002c0006f0006c0006c0:
+(val_== 0)?256'h008d000ef000e6000ad000f9000f00000100089000ef000e7000ad00000000a2:
+(val_== 1)?256'h0000000000000000000000000000000000000000000000f100080000ef000e60:
 (val_== 2)?256'h0000000000000000000000000000000000000000000000000000000000000000:
 (val_== 3)?256'h0000000000000000000000000000000000000000000000000000000000000000:
 (val_== 4)?256'h0000000000000000000000000000000000000000000000000000000000000000:

hw/efinix_fpga/ip/bram/init_hex.mem

@@ -1,27 +1,27 @@
 a2
 00
-bd
-0b
-ff
+ad
+e7
+ef
+89
+01
+f0
+f9
+ad
+e6
+ef
 8d
 e6
 ef
-cb
 80
-fd
-48
-65
-6c
-6c
-6f
-2c
-20
-77
-6f
-72
-6c
-64
-21
+f1
+00
+00
+00
+00
+00
+00
+00
 00
 00
 00