soundwire: qcom: Constify static structs

qcom_swrm_port_ops and qcom_swrm_ops are not modified and can be made
const to allow the compiler to put them in read-only memory.

Before:
   text    data     bss     dec     hex filename
  18266    3056     256   21578    544a drivers/soundwire/qcom.o

After:
   text    data     bss     dec     hex filename
  18426    2896     256   21578    544a drivers/soundwire/qcom.o
Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Link: https://lore.kernel.org/r/20200609230029.69802-1-rikard.falkeborn@gmail.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

drivers/soundwire/qcom.c

@@ -406,13 +406,13 @@ static int qcom_swrm_port_enable(struct sdw_bus *bus,
 	return ctrl->reg_write(ctrl, reg, val);
 }
 
-static struct sdw_master_port_ops qcom_swrm_port_ops = {
+static const struct sdw_master_port_ops qcom_swrm_port_ops = {
 	.dpn_set_port_params = qcom_swrm_port_params,
 	.dpn_set_port_transport_params = qcom_swrm_transport_params,
 	.dpn_port_enable_ch = qcom_swrm_port_enable,
 };
 
-static struct sdw_master_ops qcom_swrm_ops = {
+static const struct sdw_master_ops qcom_swrm_ops = {
 	.xfer_msg = qcom_swrm_xfer_msg,
 	.pre_bank_switch = qcom_swrm_pre_bank_switch,
 };