[U-Boot] [PATCH] rpi: fix up Model B entries

[popcorn mix]

I believe this is accurate for identifying boards from revision numbers:
https://github.com/AndrewFromMelbourne/raspberry_pi_revision

>From the firmware, old style revision numbers:

      case 0x02: case 0x03:
         boardrev = MAKE_BOARDREV(MODELB, 1_1); break;
      case 0x04: case 0x05: case 0x06:
         boardrev = MAKE_BOARDREV(MODELB, 1_2); break;
      case 0x07: case 0x08: case 0x09:
         boardrev = MAKE_BOARDREV(MODELA, 1_2); break;
      case 0x0d: case 0x0e: case 0x0f:
         boardrev = MAKE_BOARDREV(MODELB, 1_2); break;
      case 0x10: case 0x13: case 0x16: case 0x19:
         boardrev = MAKE_BOARDREV(MODELBPLUS, 1_2);
         break;
      case 0x11: case 0x14: case 0x17: case 0x1a:
         boardrev = MAKE_BOARDREV(CM, 1_0); break;
      case 0x12: case 0x15: case 0x18: case 0x1b:
         boardrev = MAKE_BOARDREV(MODELAPLUS, 1_1); break;
      default:
         boardrev = MAKE_BOARDREV(MODELB, 1_2); break;
      }

and new style (bits 4-11):

typedef enum
{
   BOARD_TYPE_MODELA = 0,
   BOARD_TYPE_MODELB = 1,
   BOARD_TYPE_MODELAPLUS = 2,
   BOARD_TYPE_MODELBPLUS = 3,
   BOARD_TYPE_PI2MODELB = 4,
   BOARD_TYPE_ALPHA = 5,
   BOARD_TYPE_CM = 6,
   BOARD_TYPE_PI0 = 9,
} BOARD_TYPE_T;