sysutils/u-boot-rpi-arm64: Add new port

This u-boot is intended to boot on all 64bits variants of the RPI boards
like the RPI2v1.1, RPI3* and RPI*

Suggested by: karels

sysutils/Makefile

@@ -1404,6 +1404,7 @@
     SUBDIR += u-boot-rpi3
     SUBDIR += u-boot-rpi3-32
     SUBDIR += u-boot-rpi4
+    SUBDIR += u-boot-rpi-arm64
     SUBDIR += u-boot-sinovoip-bpi-m3
     SUBDIR += u-boot-sopine
     SUBDIR += u-boot-sopine-spi

sysutils/u-boot-rpi-arm64/Makefile

@@ -0,0 +1,18 @@
+# $FreeBSD$
+
+MASTERDIR=	${.CURDIR}/../u-boot-master
+
+EXTRA_PATCHES=	${.CURDIR}/files/
+PATCHFILES+=	939129/raw
+
+MODEL=		rpi-arm64
+BOARD_CONFIG=	rpi_arm64_defconfig
+FAMILY=		rpi
+UBOOT_ARCH=	aarch64
+
+DEPENDS=	${LOCALBASE}/share/rpi-firmware/bootcode.bin:sysutils/rpi-firmware
+
+CONFIG_FRAGMENT=	${.CURDIR}/files/rpi_arm64_fragment
+FRAGMENT_NAME=	rpi_arm64_fragment
+
+.include "${MASTERDIR}/Makefile"

sysutils/u-boot-rpi-arm64/files/patch-lib_efi__loader_efi__console.c

@@ -0,0 +1,13 @@
+--- lib/efi_loader/efi_console.c.orig	2018-03-13 12:02:19 UTC
++++ lib/efi_loader/efi_console.c
+@@ -547,8 +547,8 @@ int efi_console_register(void)
+ 		printf("ERROR: Failed to register console event\n");
+ 		return r;
+ 	}
+-	/* 5000 ns cycle is sufficient for 2 MBaud */
+-	r = efi_set_timer(console_timer_event, EFI_TIMER_PERIODIC, 50);
++	/* 100 ms */
++	r = efi_set_timer(console_timer_event, EFI_TIMER_PERIODIC, 100*1000*10);
+ 	if (r != EFI_SUCCESS)
+ 		printf("ERROR: Failed to set console timer\n");
+ 	return r;

sysutils/u-boot-rpi-arm64/files/rpi_arm64_fragment

@@ -0,0 +1,2 @@
+CONFIG_ENV_FAT_DEVICE_AND_PART="1:1"
+CONFIG_RPI_EFI_NR_SPIN_PAGES=2

sysutils/u-boot-rpi-arm64/pkg-descr

@@ -0,0 +1,6 @@
+U-Boot loader and related files for the 64 bit variants of the RPI
+
+This u-boot config is made to be bootable on any 64bits RPI like the RPI2v1.1
+RPI3 and RPI4.
+
+For general information about U-Boot see WWW: https://www.denx.de/wiki/U-Boot