linux-firmware: TI CM3 (PM) firmware: get rid of unused binaries

PM firmware binaries are required for low power states of am335x soc.
Both files was never packed into image because of wrong do_install_append.

Anyway.. the elf file is built in kernel and is stored in kernel repo.

BugzID: 53969

Signed-off-by: Ramon Moesching <ramon.moesching@netmodule.com>

recipes-kernel/linux-firmware/linux-firmware_%.bbappend

@@ -45,8 +45,6 @@ LIC_FILES_CHKSUM = "\
 SRC_URI_append = " \
                  file://ti-connectivity/wl12xx-nvs.bin \
                  file://ti-connectivity/wl18xx-fw-4.bin \
-                 file://am335x-pm-firmware.bin \
-                 file://am335x-pm-firmware.elf \
                  "