drm/i915: small isolated c99 types to kernel types switch

Mixed C99 and kernel types use is getting ugly. Prefer kernel types.

sed -i 's/\buint\(8\|16\|32\|64\)_t\b/u\1/g'

Minor checkpatch fixes sprinkled on top of the changed lines.

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/14ed72e7f04c9340a057855c5950b54811f8a477.1547629303.git.jani.nikula@intel.com
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index fad5a9e..9a1340c 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -117,14 +117,14 @@
  */
 
 typedef struct {
-	uint32_t reg;
+	u32 reg;
 } i915_reg_t;
 
 #define _MMIO(r) ((const i915_reg_t){ .reg = (r) })
 
 #define INVALID_MMIO_REG _MMIO(0)
 
-static inline uint32_t i915_mmio_reg_offset(i915_reg_t reg)
+static inline u32 i915_mmio_reg_offset(i915_reg_t reg)
 {
 	return reg.reg;
 }