can: c_can: reg_map_{c,d}_can: mark as __maybe_unused

This patch marks the arrays reg_map_c_can and reg_map_d_can as __maybe_unused,
as they are indeed unused in the c_can driver. This warning shows up, when
compiling the kernel with "W=1":

    drivers/net/can/c_can/c_can.c:45:
    drivers/net/can/c_can/c_can.h:124:18: warning: ‘reg_map_d_can’ defined but not used [-Wunused-const-variable=]
    drivers/net/can/c_can/c_can.h:84:18: warning: ‘reg_map_c_can’ defined but not used [-Wunused-const-variable=]

Link: http://lore.kernel.org/r/20201006203748.1750156-4-mkl@pengutronix.de
Fixes: 33f810097769 ("can: c_can: Move overlay structure to array with offset as index")
Fixes: 69927fccd96b ("can: c_can: Add support for Bosch D_CAN controller")
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

diff --git a/drivers/net/can/c_can/c_can.h b/drivers/net/can/c_can/c_can.h
index d5567a7..92213d3 100644 (file)
--- a/drivers/net/can/c_can/c_can.h
+++ b/drivers/net/can/c_can/c_can.h
@@ -81,7 +81,7 @@ enum reg {
        C_CAN_FUNCTION_REG,
 };
 
-static const u16 reg_map_c_can[] = {
+static const u16 __maybe_unused reg_map_c_can[] = {
        [C_CAN_CTRL_REG]        = 0x00,
        [C_CAN_STS_REG]         = 0x02,
        [C_CAN_ERR_CNT_REG]     = 0x04,
@@ -121,7 +121,7 @@ static const u16 reg_map_c_can[] = {
        [C_CAN_MSGVAL2_REG]     = 0xB2,
 };
 
-static const u16 reg_map_d_can[] = {
+static const u16 __maybe_unused reg_map_d_can[] = {
        [C_CAN_CTRL_REG]        = 0x00,
        [C_CAN_CTRL_EX_REG]     = 0x02,
        [C_CAN_STS_REG]         = 0x04,