drm/amdgpu: Send STOP for the last byte of msg only

Let's just ignore the I2C_M_STOP hint from upper
layer for SMU I2C code as there is no clean
mapping between single per I2C message STOP flag
at the kernel I2C layer and the SMU, per each byte
STOP flag. We will just by default set it at the
end of the SMU I2C message.

Cc: Jean Delvare <jdelvare@suse.de>
Cc: Alexander Deucher <Alexander.Deucher@amd.com>
Cc: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>
Cc: Lijo Lazar <Lijo.Lazar@amd.com>
Cc: Stanley Yang <Stanley.Yang@amd.com>
Cc: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Suggested-by: Lazar Lijo <Lijo.Lazar@amd.com>
Signed-off-by: Luben Tuikov <luben.tuikov@amd.com>
Reviewed-by: Luben Tuikov <luben.tuikov@amd.com>
Acked-by: Alexander Deucher <Alexander.Deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -1981,9 +1981,9 @@ static int arcturus_i2c_xfer(struct i2c_adapter *i2c_adap,
 				cmd->CmdConfig |= I2C_CMD_WRITE;
 				cmd->RegisterAddr = msg->buf[j];
 			}
-			if ((msg[i].flags & I2C_M_STOP) ||
-			    (!remaining_bytes))
+			if (!remaining_bytes)
 				cmd->CmdConfig |= CMDCONFIG_STOP_MASK;
+
 			if ((j == 0) && !(msg[i].flags & I2C_M_NOSTART))
 				cmd->CmdConfig |= CMDCONFIG_RESTART_BIT;
 		}

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

@@ -2780,9 +2780,9 @@ static int navi10_i2c_xfer(struct i2c_adapter *i2c_adap,
 				cmd->CmdConfig |= I2C_CMD_WRITE;
 				cmd->RegisterAddr = msg->buf[j];
 			}
-			if ((msg[i].flags & I2C_M_STOP) ||
-			    (!remaining_bytes))
+			if (!remaining_bytes)
 				cmd->CmdConfig |= CMDCONFIG_STOP_MASK;
+
 			if ((j == 0) && !(msg[i].flags & I2C_M_NOSTART))
 				cmd->CmdConfig |= CMDCONFIG_RESTART_BIT;
 		}

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

@@ -3487,9 +3487,9 @@ static int sienna_cichlid_i2c_xfer(struct i2c_adapter *i2c_adap,
 				cmd->CmdConfig |= CMDCONFIG_READWRITE_MASK;
 				cmd->ReadWriteData = msg->buf[j];
 			}
-			if ((msg[i].flags & I2C_M_STOP) ||
-			    (!remaining_bytes))
+			if (!remaining_bytes)
 				cmd->CmdConfig |= CMDCONFIG_STOP_MASK;
+
 			if ((j == 0) && !(msg[i].flags & I2C_M_NOSTART))
 				cmd->CmdConfig |= CMDCONFIG_RESTART_BIT;
 		}