board: Remove not needed function for the K+P's imx53 board

The get_board_rev() is not needed anymore as a generic function
for the imx53 SoC has been used instead.

Signed-off-by: Lukasz Majewski <lukma@denx.de>

board/k+p/kp_imx53/kp_imx53.c

@@ -45,18 +45,6 @@ int dram_init_banksize(void)
 	return 0;
 }
 
-u32 get_board_rev(void)
-{
-	struct iim_regs *iim = (struct iim_regs *)IMX_IIM_BASE;
-	struct fuse_bank *bank = &iim->bank[0];
-	struct fuse_bank0_regs *fuse =
-		(struct fuse_bank0_regs *)bank->fuse_regs;
-
-	int rev = readl(&fuse->gp[6]);
-
-	return (get_cpu_rev() & ~(0xF << 8)) | (rev & 0xF) << 8;
-}
-
 #ifdef CONFIG_USB_EHCI_MX5
 int board_ehci_hcd_init(int port)
 {