lpc32xx: add support for board work_92105

Work_92105 from Work Microwave is an LPC3250-
based board with the following features:
- 64MB or 128MB SDR DRAM
- 1 GB SLC NAND, managed through MLC controller.
- Ethernet
- Ethernet + PHY SMSC8710
- I2C:
  - EEPROM (24M01-compatible)
  - RTC (DS1374-compatible)
  - Temperature sensor (DS620)
  - DACs (2 x MAX518)
- SPI (through SSP interface)
  - Port expander MAX6957
- LCD display (HD44780-compatible), controlled
  through the port expander and DACs

This board has SPL support, and uses the LPC32XX boot
image format.

Signed-off-by: Albert ARIBAUD (3ADEV) <albert.aribaud@3adev.fr>
diff --git a/arch/arm/include/asm/arch-lpc32xx/mux.h b/arch/arm/include/asm/arch-lpc32xx/mux.h
new file mode 100644
index 0000000..dc1b5bc
--- /dev/null
+++ b/arch/arm/include/asm/arch-lpc32xx/mux.h
@@ -0,0 +1,18 @@
+/*
+ * LPC32xx MUX interface
+ *
+ * (C) Copyright 2015  DENX Software Engineering GmbH
+ * Written-by: Albert ARIBAUD <albert.aribaud@3adev.fr>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+/**
+ * MUX register map for LPC32xx
+ */
+
+struct mux_regs {
+	u32 p_mux_set;
+	u32 p_mux_clr;
+	u32 p_mux_state;
+};