gusarambula and henrideveer thank you for the suggestions.
I've found the solution with the suggestion of henrideveer and an additional modify.
The include file:
meta-freescale/recipes-kernel/linux/linux-imx.inc
has the option:
SCMVERSION ?= "y"
changing "y" with "n" the string with commit ID is removed.
So my append recipe has become:
EXTRAPATHS_prepend := "${THISDIR}/${PN}:"
LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4f302"
SRC_URI = "git://<my_kernel_repo"
SRCREV = "1111111111111111111111111"
#SRCREV = "${AUTOREV}"
# Remove from the kernel version the additional string with commid ID of linux-imx repository
SCMVERSION = "n"
Moreover, the defconfig of kernel has to be:
CONFIG_LOCALVERSION=""
CONFIG_LOCALVERSION_AUTO=n