Small bug in can_rx_mode()

[billforsternz]

On line 508 of mcp2515.c;

can_w_bit(MCP2515_RXB0CTRL + rxb*0x10, MCP2515_RXB0CTRL_RXM0 | MCP2515_RXB0CTRL_RXM0, mode);

Should be;

can_w_bit(MCP2515_RXB0CTRL + rxb*0x10, MCP2515_RXB0CTRL_RXM1 | MCP2515_RXB0CTRL_RXM0, mode);

Reason; This function is intended for setting a 2 bit field to one of 4 values, so the mask parameter should be constructed from two single bit masks. Looks like a typo / copy/paste error.