drm/amd/display: Replace uint8_t with u8 for dp_hdmi_dongle_signature_str

The string dp_hdmi_dongle_signature_str already uses u8 but the string
dp_hdmi_dongle_signature_str does not. Just replace uint8_t with u8 for
dp_hdmi_dongle_signature_str.
Reviewed-by: Wenjing Liu <wenjing.liu@amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Rodrigo Siqueira <rodrigo.siqueira@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/link/link_detection.c

@@ -65,7 +65,7 @@
 
 static const u8 DP_SINK_BRANCH_DEV_NAME_7580[] = "7580\x80u";
 
-static const uint8_t dp_hdmi_dongle_signature_str[] = "DP-HDMI ADAPTOR";
+static const u8 dp_hdmi_dongle_signature_str[] = "DP-HDMI ADAPTOR";
 
 static enum ddc_transaction_type get_ddc_transaction_type(enum signal_type sink_signal)
 {