drm/amd/amdgpu: Fix errors & warnings in amdgpu _uvd, _vce.c

Fix below checkpatch errors & warnings:

In amdgpu_uvd.c:

WARNING: Prefer 'unsigned int' to bare use of 'unsigned'
WARNING: Prefer 'unsigned int *' to bare use of 'unsigned *'
WARNING: Missing a blank line after declarations
WARNING: %Lx is non-standard C, use %llx
ERROR: space required before the open parenthesis '('
ERROR: space required before the open brace '{'
WARNING: %LX is non-standard C, use %llX
WARNING: Block comments use * on subsequent lines
+/* multiple fence commands without any stream commands in between can
+   crash the vcpu so just try to emmit a dummy create/destroy msg to
WARNING: Block comments use a trailing */ on a separate line
+   avoid this */
WARNING: braces {} are not necessary for single statement blocks
+               for (j = 0; j < adev->uvd.num_enc_rings; ++j) {
+                       fences += amdgpu_fence_count_emitted(&adev->uvd.inst[i].ring_enc[j]);
+               }

In amdgpu_vce.c:

WARNING: Prefer 'unsigned int' to bare use of 'unsigned'
WARNING: Missing a blank line after declarations
WARNING: %Lx is non-standard C, use %llx
WARNING: Possible repeated word: 'we'
ERROR: space required before the open parenthesis '('

Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Christian König <christian.koenig@amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Acked-by: Luben Tuikov <luben.tuikov@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>