PE DLL fixups of initialized data

Code:

macro dbdd bytes,long {
    db bytes
    dd long
}

section ".code" code readable executable
...

blit32:
   mov     eax,[fwidth]
        shl     eax,2
       mov     edx,[fheight]
       sub     [lockrc.Pitch],eax
.line:  mov   ecx,[fwidth]
        rep     movsd
       add     edi,[lockrc.Pitch]
  dec     edx
 ja      .line
       retn

blit16:
     mov     eax,[fwidth]
        add     eax,eax
     mov     edx,[fheight]
       sub     [lockrc.Pitch],eax
.line:  mov   ecx,[fwidth]
.pixel: mov eax,[esi]       ; red
       mov     ebx,[esi]       ; green
     mov     ebp,[esi]       ; blue
      shr     eax,08h
     shr     ebx,05h
     shr     ebp,03h
     and     eax,0000F800h
       and     ebx,000007E0h
       and     ebp,0000001Fh
       add     ebx,ebp
     add     eax,ebx
     stosw
       add     esi,04h
     loop    .pixel
      add     edi,[lockrc.Pitch]
  dec     edx
 ja      .line
       retn

section ".data" data readable writeable
    data import
    library kernel32,"kernel32.dll",user32,"user32.dll"
     include "%include%/apia/kernel32.inc"
     include "%include%/apia/user32.inc"
    end data
    data fixups
    end data

...
blitprocs:   dbdd    D3DFMT_A8R8G8B8,blit32
              dbdd    D3DFMT_X8R8G8B8,blit32
              dbdd    D3DFMT_A1R5G5B5,blit16
              dbdd    D3DFMT_X1R5G5B5,blit16
              dbdd    D3DFMT_R5G6B5,blit16
                db       0

The latter declarations do not work, I am forced to use RVA operator:

Code:

blitprocs:        dbdd    D3DFMT_A8R8G8B8,RVA blit32
          dbdd    D3DFMT_X8R8G8B8,RVA blit32
          dbdd    D3DFMT_A1R5G5B5,RVA blit16
          dbdd    D3DFMT_X1R5G5B5,RVA blit16
          dbdd    D3DFMT_R5G6B5,RVA blit16
            db      0