meta/recipes-kernel: Add HOMEPAGE / DESCRIPTION

Added missing HOMEPAGE and DESCRIPTION found using the test command
`oe-selftest -r distrodata.Distrodata.test_missing_homepg`

[YOCTO #13471]

(From OE-Core rev: 2f2fb08e0d312d82749bea147306897c00df650e)

Signed-off-by: Dorinda Bassey <dorindabassey@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 693988ec423341b930e93d604638826cccba9e37)
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-kernel/linux-firmware/linux-firmware_20210208.bb

@@ -1,4 +1,5 @@
 SUMMARY = "Firmware files for use with Linux kernel"
+HOMEPAGE = "https://www.kernel.org/"
 DESCRIPTION = "Linux firmware is a package distributed alongside the Linux kernel \
 that contains firmware binary blobs necessary for partial or full functionality \
 of certain hardware devices."

meta/recipes-kernel/linux-libc-headers/linux-libc-headers.inc

@@ -1,4 +1,5 @@
 SUMMARY = "Sanitized set of kernel headers for the C library's use"
+HOMEPAGE = "https://www.kernel.org/"
 DESCRIPTION = "Designed to maintain an Application Programming Interface (API) stable version of the Linux headers"
 SECTION = "devel"
 LICENSE = "GPLv2"

meta/recipes-kernel/systemtap/systemtap-uprobes_git.bb

@@ -1,5 +1,5 @@
 SUMMARY = "UProbes kernel module for SystemTap"
-
+HOMEPAGE = "https://sourceware.org/systemtap/"
 require systemtap_git.inc
 
 DEPENDS = "systemtap virtual/kernel"