arch/hexagon/kernel/dma.c: make function static
arch/hexagon/kernel/dma.c: make function static

This function is only used in the same file, and the other similar
functions in this file are also static.

Signed-off-by: Julia Lawall <3d4a3affaf9163789962e9770780389962bda29d@lip6.fr>
[5c405e4535fa35126dd73e0f658fb1523e5f9f8e@codeaurora.org: adjusted patch to apply to latest]
Signed-off-by: Richard Kuo <5c405e4535fa35126dd73e0f658fb1523e5f9f8e@codeaurora.org>

KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas