[9610] wlbt: Fix compilation error change atomic_read -> refcount_read (Android P)

[9610] wlbt: Fix compilation error change atomic_read -> refcount_read (Android P)

drivers/net/wireless/scsc/udi.c:1100:231: error: 'refcount_t' has no member named 'counter'
   SLSI_WARN(sdev, "UDI client File op release not completed yet! (count=%d)\n", atomic_read(&kref->refcount));
                                                                                                                                                                                                                                       ^
drivers/net/wireless/scsc/udi.c:1100:312: error: 'refcount_t' has no member named 'counter'
   SLSI_WARN(sdev, "UDI client File op release not completed yet! (count=%d)\n", atomic_read(&kref->refcount));
                                                                                                                                                                                                                                                                                                                        ^
drivers/net/wireless/scsc/udi.c:1100:357: error: 'refcount_t' has no member named 'counter'
   SLSI_WARN(sdev, "UDI client File op release not completed yet! (count=%d)\n", atomic_read(&kref->refcount));
                                                                                                                                                                                                                                                                                                                                                                     ^
drivers/net/wireless/scsc/udi.c:1100:419: error: 'refcount_t' has no member named 'counter'
   SLSI_WARN(sdev, "UDI client File op release not completed yet! (count=%d)\n", atomic_read(&kref->refcount));
                                                                                                                                                                                                                                                                                                                                                                                                                                   ^
drivers/net/wireless/scsc/udi.c:1100:464: error: 'refcount_t' has no member named 'counter'
   SLSI_WARN(sdev, "UDI client File op release not completed yet! (count=%d)\n", atomic_read(&kref->refcount));

Change-Id: I8de110227cd5eab8e2d172ad2a25505545b7bf6c
SCSC-Bug-Id: SSB-40175
Signed-off-by: Tarun Karela <t.karela@samsung.com>