bktr(4): remove useless assignment

[Frederic Cambus]

Hi tech@,

Remove useless assignment, value is overwritten right after being set.

Coverity CID 1453008.

Comments? OK?

Index: dev/pci/bktr/bktr_core.c
===================================================================
RCS file: /cvs/src/sys/dev/pci/bktr/bktr_core.c,v
retrieving revision 1.39
diff -u -p -r1.39 bktr_core.c
--- dev/pci/bktr/bktr_core.c    28 Apr 2018 15:44:59 -0000      1.39
+++ dev/pci/bktr/bktr_core.c    17 Nov 2018 21:24:29 -0000
@@ -2864,7 +2864,6 @@ yuvpack_prog( bktr_ptr_t bktr, char i_fl
        OUTB(bktr, BKTR_COLOR_CTL, INB(bktr, BKTR_COLOR_CTL) | 
BT848_COLOR_CTL_RGB_DED | BT848_COLOR_CTL_GAMMA);
        OUTB(bktr, BKTR_ADC, SYNC_LEVEL);
 
-       bktr->capcontrol =   1 << 6 | 1 << 4 | 1 << 2 | 3;
        bktr->capcontrol = 3 << 2 |  3;
 
        dma_prog = (u_int *) bktr->dma_prog;