drm/amdgpu: only set restart on first cmd of the smu i2c transaction

Not sure how the firmware interprets these.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Luben Tuikov <luben.tuikov@amd.com>

drivers/gpu/drm/amd/pm/swsmu/smu11/arcturus_ppt.c

@@ -1984,7 +1984,7 @@ static int arcturus_i2c_xfer(struct i2c_adapter *i2c_adap,
 			if ((msg[i].flags & I2C_M_STOP) ||
 			    (!remaining_bytes))
 				cmd->CmdConfig |= CMDCONFIG_STOP_MASK;
-			if ((i > 0) && !(msg[i].flags & I2C_M_NOSTART))
+			if ((i > 0) && (j == 0) && !(msg[i].flags & I2C_M_NOSTART))
 				cmd->CmdConfig |= CMDCONFIG_RESTART_BIT;
 		}
 	}

drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c

@@ -2783,7 +2783,7 @@ static int navi10_i2c_xfer(struct i2c_adapter *i2c_adap,
 			if ((msg[i].flags & I2C_M_STOP) ||
 			    (!remaining_bytes))
 				cmd->CmdConfig |= CMDCONFIG_STOP_MASK;
-			if ((i > 0) && !(msg[i].flags & I2C_M_NOSTART))
+			if ((i > 0) && (j == 0) && !(msg[i].flags & I2C_M_NOSTART))
 				cmd->CmdConfig |= CMDCONFIG_RESTART_BIT;
 		}
 	}

drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c

@@ -3490,7 +3490,7 @@ static int sienna_cichlid_i2c_xfer(struct i2c_adapter *i2c_adap,
 			if ((msg[i].flags & I2C_M_STOP) ||
 			    (!remaining_bytes))
 				cmd->CmdConfig |= CMDCONFIG_STOP_MASK;
-			if ((i > 0) && !(msg[i].flags & I2C_M_NOSTART))
+			if ((i > 0) && (j == 0) && !(msg[i].flags & I2C_M_NOSTART))
 				cmd->CmdConfig |= CMDCONFIG_RESTART_BIT;
 		}
 	}