[patch] drm/i915: fix a read size argument

[Dan Carpenter]

We want to read 3 bytes here, but because the parenthesis are in the
wrong place we instead read:

        sizeof(intel_dp->edp_dpcd) == sizeof(intel_dp->edp_dpcd)

which is one byte.

Fixes: fe5a66f91c88 ("drm/i915: Read PSR caps/intermediate freqs/etc. only once 
on eDP")
Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 14a3cf0..ee8aa95 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -3551,8 +3551,8 @@ intel_edp_init_dpcd(struct intel_dp *intel_dp)
        /* Read the eDP Display control capabilities registers */
        if ((intel_dp->dpcd[DP_EDP_CONFIGURATION_CAP] & 
DP_DPCD_DISPLAY_CONTROL_CAPABLE) &&
            drm_dp_dpcd_read(&intel_dp->aux, DP_EDP_DPCD_REV,
-                            intel_dp->edp_dpcd, sizeof(intel_dp->edp_dpcd) ==
-                            sizeof(intel_dp->edp_dpcd)))
+                            intel_dp->edp_dpcd, sizeof(intel_dp->edp_dpcd)) ==
+                            sizeof(intel_dp->edp_dpcd))
                DRM_DEBUG_KMS("EDP DPCD : %*ph\n", (int) 
sizeof(intel_dp->edp_dpcd),
                              intel_dp->edp_dpcd);