drm/i915: Add braces around the else block in clflush_write32()

According to the kernel coding style, if only one branch of a
conditional statement is a single statement, braces should
still be used in both branches.

Signed-off-by: Sebastian Brzezinka <sebastian.brzezinka@intel.com>
Reviewed-by: Krzysztof Karas <krzysztof.karas@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://lore.kernel.org/r/20250718102752.684975-2-sebastian.brzezinka@intel.com

Author: sberbz

drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c

@@ -1382,8 +1382,9 @@ static void clflush_write32(u32 *addr, u32 value, unsigned int flushes)
 		 */
 		if (flushes & CLFLUSH_AFTER)
 			drm_clflush_virt_range(addr, sizeof(*addr));
-	} else
+	} else {
 		*addr = value;
+	}
 }
 
 static u64