arm: socfpga: Add missing DW master SPI clock prototyp to clock_manager.h

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Chin Liang See <clsee@altera.com>
Cc: Dinh Nguyen <dinguyen@altera.com>
Cc: Vince Bridgers <vbridger@altera.com>
Cc: Marek Vasut <marex@denx.de>
Acked-by: Pavel Machek <pavel@denx.de>

arch/arm/include/asm/arch-socfpga/clock_manager.h

@@ -14,6 +14,7 @@ unsigned long cm_get_sdram_clk_hz(void);
 unsigned int cm_get_l4_sp_clk_hz(void);
 unsigned int cm_get_mmc_controller_clk_hz(void);
 unsigned int cm_get_qspi_controller_clk_hz(void);
+unsigned int cm_get_spi_controller_clk_hz(void);
 #endif
 
 typedef struct {