u-boot-variscite: Updated to latest revision

Added the following commits:

b4382a99ab2 imx8mm_var_dart: Use DDR configuration data in EEPROM
7ff775603db imx8mm_var_dart: Update LPDDR4 configuration
72d1c3a009d imx8mm_var_dart: lpddr4_timing.c: Declare locally used structures static
c3b4b5e200f imx8mm_var_dart: lpddr4_timing.c: Cosmetic code cleanup
41435f6db4e imx8m-var-dart: Move USB code to a separate file
1a8fe61d44d imx8m_var_dart: defconfigs: Use the output of savedefconfig

recipes-bsp/u-boot/u-boot-common.inc

@@ -4,7 +4,7 @@ LIC_FILES_CHKSUM = "file://Licenses/gpl-2.0.txt;md5=b234ee4d69f5fce4486a80fdaf4a
 UBOOT_SRC ?= "git://github.com/varigit/uboot-imx;protocol=git"
 SRCBRANCH = "imx_v2018.03_4.14.78_1.0.0_ga_var01"
 SRC_URI = "${UBOOT_SRC};branch=${SRCBRANCH}"
-SRCREV = "b447b1689a0595fd4c20c26863d1232d72ffca94"
+SRCREV = "b4382a99ab25b4f5718383637ea98bb1b23bcfc5"
 
 S = "${WORKDIR}/git"