drm/amd/display: fixed that I2C over AUX didn't read data issue

[Why]
The variable mismatch assignment error.

[How]
To use uint32_t replace it.
Signed-off-by: Brandon Syu <Brandon.Syu@amd.com>
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c

@@ -586,7 +586,7 @@ bool dal_ddc_service_query_ddc_data(
 bool dal_ddc_submit_aux_command(struct ddc_service *ddc,
 		struct aux_payload *payload)
 {
-	uint8_t retrieved = 0;
+	uint32_t retrieved = 0;
 	bool ret = 0;
 
 	if (!ddc)

drivers/gpu/drm/amd/display/include/i2caux_interface.h

@@ -42,7 +42,7 @@ struct aux_payload {
 	bool write;
 	bool mot;
 	uint32_t address;
-	uint8_t length;
+	uint32_t length;
 	uint8_t *data;
 	/*
 	 * used to return the reply type of the transaction