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/sys_proto.h b/arch/arm/include/asm/arch-lpc32xx/sys_proto.h
index 86d5ee9..c3d890d 100644
--- a/arch/arm/include/asm/arch-lpc32xx/sys_proto.h
+++ b/arch/arm/include/asm/arch-lpc32xx/sys_proto.h
@@ -7,10 +7,14 @@
 #ifndef _LPC32XX_SYS_PROTO_H
 #define _LPC32XX_SYS_PROTO_H
 
+#include <asm/arch/emc.h>
+
 void lpc32xx_uart_init(unsigned int uart_id);
 void lpc32xx_mac_init(void);
 void lpc32xx_mlc_nand_init(void);
 void lpc32xx_i2c_init(unsigned int devnum);
 void lpc32xx_ssp_init(void);
-
+#if defined(CONFIG_SPL_BUILD)
+void ddr_init(const struct emc_dram_settings *dram);
+#endif
 #endif /* _LPC32XX_SYS_PROTO_H */