arm: aspeed: add strap define 25HZ of AST2500

Provide a definition for the "25Hz reference clock input mode" strap

Signed-off-by: Igor Kononenko <i.kononenko@yadro.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20200811203502.20382-1-i.kononenko@yadro.com>
Message-Id: <20200819100956.2216690-21-clg@kaod.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>

include/hw/misc/aspeed_scu.h

@@ -286,6 +286,7 @@ uint32_t aspeed_scu_get_apb_freq(AspeedSCUState *s);
 #define SCU_AST2500_HW_STRAP_ESPI_FLASH_ENABLE     (0x1 << 26)
 #define SCU_AST2500_HW_STRAP_ESPI_ENABLE           (0x1 << 25)
 #define SCU_AST2500_HW_STRAP_DDR4_ENABLE           (0x1 << 24)
+#define SCU_AST2500_HW_STRAP_25HZ_CLOCK_MODE       (0x1 << 23)
 
 #define SCU_AST2500_HW_STRAP_ACPI_ENABLE           (0x1 << 19)
 #define SCU_AST2500_HW_STRAP_USBCKI_FREQ           (0x1 << 18)