u-boot: remove unused FILESPATH

Fixes [YOCTO #4497]

Usage of FILESPATH is discouraged, since it can make recipes harder to
bbappend. Instead FILESEXTRAPATHS should be used to extend the path.
However in u-boot no FILESPATH additions are currently needed so
instead it should be removed.

(From OE-Core rev: f8675ffa3f90d4e411a82d33ac8319f2c4c19235)

Signed-off-by: Petter Mabäcker <petter@technux.se>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

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

@@ -65,7 +65,6 @@ do_install () {
 }
 
 FILES_${PN} = "/boot ${sysconfdir}"
-FILESPATH =. "${FILE_DIRNAME}/u-boot-git/${MACHINE}:"
 
 do_deploy () {
     install -d ${DEPLOYDIR}