drm/xe/hwmon: Fix WRITE_I1 param from u32 to u16

WRITE_I1 sub-command of the POWER_SETUP pcode command accepts a u16
parameter instead of u32. This change prevents potential illegal
sub-command errors.

v2: Mask uval instead of changing the prototype. (Badal)

v3: Rephrase commit message. (Badal)
Signed-off-by: Karthik Poosa <karthik.poosa@intel.com>
Fixes: 92d44a42 ("drm/xe/hwmon: Expose card reactive critical power")
Reviewed-by: Badal Nilawar <badal.nilawar@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240827155301.183383-1-karthik.poosa@intel.comSigned-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

drivers/gpu/drm/xe/xe_hwmon.c

@@ -450,7 +450,7 @@ static int xe_hwmon_pcode_write_i1(struct xe_gt *gt, u32 uval)
 {
 	return xe_pcode_write(gt, PCODE_MBOX(PCODE_POWER_SETUP,
 			      POWER_SETUP_SUBCOMMAND_WRITE_I1, 0),
-			      uval);
+			      (uval & POWER_SETUP_I1_DATA_MASK));
 }
 
 static int xe_hwmon_power_curr_crit_read(struct xe_hwmon *hwmon, int channel,