drm/amdgpu: clean up some inconsistent indenting

Eliminate the follow smatch warning:

drivers/gpu/drm/amd/amdgpu/nbio_v7_7.c:35 nbio_v7_7_get_rev_id() warn:
inconsistent indenting.

drivers/gpu/drm/amd/amdgpu/nbio_v7_7.c:214 nbio_v7_7_init_registers()
warn: inconsistent indenting.
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/nbio_v7_7.c

@@ -33,7 +33,6 @@ static u32 nbio_v7_7_get_rev_id(struct amdgpu_device *adev)
 	u32 tmp;
 
 	tmp = RREG32_SOC15(NBIO, 0, regRCC_STRAP0_RCC_DEV0_EPF0_STRAP0);
-
 	tmp &= RCC_STRAP0_RCC_DEV0_EPF0_STRAP0__STRAP_ATI_REV_ID_DEV0_F0_MASK;
 	tmp >>= RCC_STRAP0_RCC_DEV0_EPF0_STRAP0__STRAP_ATI_REV_ID_DEV0_F0__SHIFT;