drm/amdgpu: Fix warnings in gfxhub_ v1_0, v1_2.c

Fix the below checkpatch warnings:

WARNING: Block comments should align the * on each line
+                       /*
+                       * Raven2 has a HW issue that it is unable to use the

WARNING: Prefer 'unsigned int' to bare use of 'unsigned'
+       unsigned num_level, block_size;

WARNING: Prefer 'unsigned int' to bare use of 'unsigned'
+       unsigned i;

WARNING: Missing a blank line after declarations
+       u32 tmp;
+       tmp = RREG32_SOC15(GC, 0, mmVM_L2_PROTECTION_FAULT_CNTL);

WARNING: Block comments should align the * on each line
+                               /*
+                               * Raven2 has a HW issue that it is unable to use the

WARNING: Prefer 'unsigned int' to bare use of 'unsigned'
+       unsigned num_level, block_size;

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