drivers: dma: Mark functions as static in dma_v3.c
drivers: dma: Mark functions as static in dma_v3.c

Mark the functions ioat3_prep_xor_val(), ioat3_prep_pq_val() and
ioat3_prep_pqxor_val() as static in dma_v3.c because they are not used
outside this file.

This eliminates the following warnings in dma_v3.c:
drivers/dma/ioat/dma_v3.c:741:1: warning: no previous prototype for ‘ioat3_prep_xor_val’ [-Wmissing-prototypes]
drivers/dma/ioat/dma_v3.c:1092:1: warning: no previous prototype for ‘ioat3_prep_pq_val’ [-Wmissing-prototypes]
drivers/dma/ioat/dma_v3.c:1134:1: warning: no previous prototype for ‘ioat3_prep_pqxor_val’ [-Wmissing-prototypes]

Signed-off-by: Rashika Kheria <62a2cbd3422b0d621dafb7ceeff40187aeaed4ed@gmail.com>
Reviewed-by: Josh Triplett <c028c213ed5efcf30c3f4fc7361dbde0c893c5b7@joshtriplett.org>
Acked-by: Vinod Koul <5cf69c63beb17bf38d63aa0e923ee8256af0e205@intel.com>
Signed-off-by: Dan Williams <24ee2bf0bd8ac766c348bf1f0639943bac1535c6@intel.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs