drm/amd/display: use drm defines for MAX CASCADE MASK

[Why]
drm already has this define

[How]
drm Mask is 0x08 vs 0x0800. The reason is because drm mask
works on a byte.        ^^
                 =======||
                 ||
Since the first byte is always zero we can ignore it and only check the
second byte.
Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/modules/hdcp/hdcp.h

@@ -35,8 +35,6 @@
 /* TODO:
  * Replace below defines with these
  *
- * #define DRM_HDCP_MAX_CASCADE_EXCEEDED(x)        (x & BIT(3))
- * #define DRM_HDCP_MAX_CASCADE_EXCEEDED(x)        (x & BIT(3))
  * #define HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(x)     ((x) & 0x3)
  * #define HDCP_2_2_HDMI_RXSTATUS_READY(x)         ((x) & BIT(2))
  * #define HDCP_2_2_HDMI_RXSTATUS_REAUTH_REQ(x)    ((x) & BIT(3))
@@ -46,8 +44,6 @@
  * split the HDMI rxstatus into 2bytes before we can use usptream defs
  */
 
-#define BSTATUS_MAX_CASCADE_EXCEEDED_MASK		0x0800
-#define BINFO_MAX_CASCADE_EXCEEDED_MASK_DP		0x0800
 #define RXSTATUS_MSG_SIZE_MASK				0x03FF
 #define RXSTATUS_READY_MASK				0x0400
 #define RXSTATUS_REAUTH_REQUEST_MASK			0x0800

drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_execution.c

@@ -92,15 +92,13 @@ static inline enum mod_hdcp_status check_no_max_cascade(struct mod_hdcp *hdcp)
 	enum mod_hdcp_status status;
 
 	if (is_dp_hdcp(hdcp))
-		status = (hdcp->auth.msg.hdcp1.binfo_dp &
-				BINFO_MAX_CASCADE_EXCEEDED_MASK_DP) ?
-			MOD_HDCP_STATUS_HDCP1_MAX_CASCADE_EXCEEDED_FAILURE :
-			MOD_HDCP_STATUS_SUCCESS;
+		status = DRM_HDCP_MAX_CASCADE_EXCEEDED(hdcp->auth.msg.hdcp1.binfo_dp >> 8)
+				 ? MOD_HDCP_STATUS_HDCP1_MAX_CASCADE_EXCEEDED_FAILURE
+				 : MOD_HDCP_STATUS_SUCCESS;
 	else
-		status = (hdcp->auth.msg.hdcp1.bstatus &
-				BSTATUS_MAX_CASCADE_EXCEEDED_MASK) ?
-				MOD_HDCP_STATUS_HDCP1_MAX_CASCADE_EXCEEDED_FAILURE :
-				MOD_HDCP_STATUS_SUCCESS;
+		status = DRM_HDCP_MAX_CASCADE_EXCEEDED(hdcp->auth.msg.hdcp1.bstatus >> 8)
+				 ? MOD_HDCP_STATUS_HDCP1_MAX_CASCADE_EXCEEDED_FAILURE
+				 : MOD_HDCP_STATUS_SUCCESS;
 	return status;
 }