arm: mvebu: Define env_sf_get_env_addr() for all Armada boards in SPL

SPI0 CS0 Flash is mapped to address range 0xD4000000 - 0xD7FFFFFF by BootROM.
Proper U-Boot removes this direct mapping. So it is available only in SPL.
This applies for all 32-bit Armada BootROMs. SPL mvebu code is used only on
32-bit Armada SoCs. So move env_sf_get_env_addr() function from Turris
Omnia board to common SPL mvebu code and add proper checks for SPI0 CS0.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/arch/arm/mach-mvebu/spl.c b/arch/arm/mach-mvebu/spl.c
index bfcba2e..ca2d5a5 100644
--- a/arch/arm/mach-mvebu/spl.c
+++ b/arch/arm/mach-mvebu/spl.c
@@ -299,6 +299,19 @@
 	hang();
 }
 
+/*
+ * SPI0 CS0 Flash is mapped to address range 0xD4000000 - 0xD7FFFFFF by BootROM.
+ * Proper U-Boot removes this direct mapping. So it is available only in SPL.
+ */
+#if defined(CONFIG_SPL_ENV_IS_IN_SPI_FLASH) && \
+    CONFIG_ENV_SPI_BUS == 0 && CONFIG_ENV_SPI_CS == 0 && \
+    CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE <= 64*1024*1024
+void *env_sf_get_env_addr(void)
+{
+	return (void *)0xD4000000 + CONFIG_ENV_OFFSET;
+}
+#endif
+
 void board_init_f(ulong dummy)
 {
 	int ret;