drivers: can: mcp251xfd: use proper namespace for Kconfig symbols

Use proper namespace for the CAN mcp251xfd Kconfig symbols, renaming
CONFIG_CAN_MAX_FILTER to CONFIG_CAN_MCP251XFD_MAX_FILTER.

This prevents Kconfig symbol clashes between different CAN controller
drivers.

Signed-off-by: Henrik Brix Andersen <henrik@brixandersen.dk>

Author: henrikbrixandersen

drivers/can/Kconfig.mcp251xfd

@@ -51,7 +51,7 @@ config CAN_MCP251XFD_READ_CRC_RETRIES
 	help
 	  Number of retries during SFR register read if CRC fails.
 
-config CAN_MAX_FILTER
+config CAN_MCP251XFD_MAX_FILTER
 	int "Maximum number of concurrent active filters"
 	default 5
 	range 1 32

drivers/can/can_mcp251xfd.c

@@ -556,13 +556,13 @@ static int mcp251xfd_add_rx_filter(const struct device *dev, can_rx_callback_t r
 
 	k_mutex_lock(&dev_data->mutex, K_FOREVER);
 
-	for (filter_idx = 0; filter_idx < CONFIG_CAN_MAX_FILTER ; filter_idx++) {
+	for (filter_idx = 0; filter_idx < CONFIG_CAN_MCP251XFD_MAX_FILTER ; filter_idx++) {
 		if ((BIT(filter_idx) & dev_data->filter_usage) == 0) {
 			break;
 		}
 	}
 
-	if (filter_idx >= CONFIG_CAN_MAX_FILTER) {
+	if (filter_idx >= CONFIG_CAN_MCP251XFD_MAX_FILTER) {
 		filter_idx = -ENOSPC;
 		goto done;
 	}
@@ -629,7 +629,7 @@ static void mcp251xfd_remove_rx_filter(const struct device *dev, int filter_idx)
 	uint32_t *reg;
 	int ret;
 
-	if (filter_idx < 0 || filter_idx >= CONFIG_CAN_MAX_FILTER) {
+	if (filter_idx < 0 || filter_idx >= CONFIG_CAN_MCP251XFD_MAX_FILTER) {
 		LOG_ERR("Filter ID %d out of bounds", filter_idx);
 		return;
 	}
@@ -731,7 +731,7 @@ static int mcp251xfd_get_max_filters(const struct device *dev, bool ide)
 {
 	ARG_UNUSED(ide);
 
-	return CONFIG_CAN_MAX_FILTER;
+	return CONFIG_CAN_MCP251XFD_MAX_FILTER;
 }
 
 static int mcp251xfd_handle_fifo_read(const struct device *dev, const struct mcp251xfd_fifo *fifo,

drivers/can/can_mcp251xfd.h

@@ -499,9 +499,9 @@ struct mcp251xfd_data {
 
 	/* Filter Data */
 	uint32_t filter_usage;
-	struct can_filter filter[CONFIG_CAN_MAX_FILTER];
-	can_rx_callback_t rx_cb[CONFIG_CAN_MAX_FILTER];
-	void *cb_arg[CONFIG_CAN_MAX_FILTER];
+	struct can_filter filter[CONFIG_CAN_MCP251XFD_MAX_FILTER];
+	can_rx_callback_t rx_cb[CONFIG_CAN_MCP251XFD_MAX_FILTER];
+	void *cb_arg[CONFIG_CAN_MCP251XFD_MAX_FILTER];
 
 	const struct device *dev;