ddr: altera: Move struct sdram_prot_rule prototype

Move the structure prototype from sdram.h header file into sdram.c
source file, since it is used only there and for local purpose only.
There is no point in having it global.

While at this move, fix the data types in the structure from uintNN_t
to uNN and fix the coding style a bit.

Signed-off-by: Marek Vasut <marex@denx.de>

drivers/ddr/altera/sdram.c

@@ -22,6 +22,19 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+struct sdram_prot_rule {
+	u64	sdram_start;	/* SDRAM start address */
+	u64	sdram_end;	/* SDRAM end address */
+	u32	rule;		/* SDRAM protection rule number: 0-19 */
+	int	valid;		/* Rule valid or not? 1 - valid, 0 not*/
+
+	u32	security;
+	u32	portmask;
+	u32	result;
+	u32	lo_prot_id;
+	u32	hi_prot_id;
+};
+
 static struct socfpga_system_manager *sysmgr_regs =
 	(struct socfpga_system_manager *)SOCFPGA_SYSMGR_ADDRESS;
 static struct socfpga_sdr_ctrl *sdr_ctrl =