drm/i915/wm: Initialize max_latency variable to appropriate value

Initialize max_latency variable to LNL_PKG_C_LATENCY_MASK which helps
to eliminate the else block and make the whole code a lot cleaner.

--v2
-Seprate patch to club variables together [Mitul]

Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Reviewed-by: Mitul Golani <mitulkumar.ajitkumar.golani@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241203084706.2126189-1-suraj.kandpal@intel.com

Author: surajk8

drivers/gpu/drm/i915/display/skl_watermark.c

@@ -2857,7 +2857,7 @@ static int skl_wm_add_affected_planes(struct intel_atomic_state *state,
 static void
 skl_program_dpkgc_latency(struct drm_i915_private *i915, bool enable_dpkgc)
 {
-	u32 max_latency = 0;
+	u32 max_latency = LNL_PKG_C_LATENCY_MASK;
 	u32 clear = 0, val = 0;
 	u32 added_wake_time = 0;
 
@@ -2870,9 +2870,6 @@ skl_program_dpkgc_latency(struct drm_i915_private *i915, bool enable_dpkgc)
 			max_latency = LNL_PKG_C_LATENCY_MASK;
 		added_wake_time = DSB_EXE_TIME +
 			i915->display.sagv.block_time_us;
-	} else {
-		max_latency = LNL_PKG_C_LATENCY_MASK;
-		added_wake_time = 0;
 	}
 
 	clear |= LNL_ADDED_WAKE_TIME_MASK | LNL_PKG_C_LATENCY_MASK;