drm/i915: prefer 3-letter acronym for tigerlake

We are currently using a mix of platform name and acronym to name the
functions. Let's prefer the acronym as it should be clear what platform
it's about and it's shorter, so it doesn't go over 80 columns in a few
cases. This converts tigerlake to tgl where appropriate.

Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Acked-by: Jani Nikula <jani.nikula@linux.intel.com>
Acked-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191224084012.24241-10-lucas.demarchi@intel.com

drivers/gpu/drm/i915/gt/intel_mocs.c

@@ -233,7 +233,7 @@ static const struct drm_i915_mocs_entry broxton_mocs_table[] = {
 		   LE_3_WB | LE_TC_1_LLC | LE_LRUM(3), \
 		   L3_1_UC)
 
-static const struct drm_i915_mocs_entry tigerlake_mocs_table[] = {
+static const struct drm_i915_mocs_entry tgl_mocs_table[] = {
 	/* Base - Error (Reserved for Non-Use) */
 	MOCS_ENTRY(0, 0x0, 0x0),
 	/* Base - Reserved */
@@ -284,8 +284,8 @@ static bool get_mocs_settings(const struct drm_i915_private *i915,
 			      struct drm_i915_mocs_table *table)
 {
 	if (INTEL_GEN(i915) >= 12) {
-		table->size  = ARRAY_SIZE(tigerlake_mocs_table);
-		table->table = tigerlake_mocs_table;
+		table->size  = ARRAY_SIZE(tgl_mocs_table);
+		table->table = tgl_mocs_table;
 		table->n_entries = GEN11_NUM_MOCS_ENTRIES;
 	} else if (IS_GEN(i915, 11)) {
 		table->size  = ARRAY_SIZE(icl_mocs_table);