scripts: footprint: fix hifive1 rev.B board name

Rev B of hifive1 is 'hifive1_revb' since 07e4ba4

Signed-off-by: Dmitrii Golovanov <dmitrii.golovanov@intel.com>

Author: golowanow

scripts/footprint/plan.txt

@@ -4,7 +4,7 @@ footprints,default,disco_l475_iot1,tests/benchmarks/footprints,,benchmark.kernel
 footprints,userspace,disco_l475_iot1,tests/benchmarks/footprints,-DCONF_FILE=prj_userspace.conf,benchmark.kernel.footprints.userspace
 footprints,default,nrf5340dk/nrf5340/cpuapp,tests/benchmarks/footprints,,benchmark.kernel.footprints.default
 footprints,default,nrf51dk/nrf51822,tests/benchmarks/footprints,,benchmark.kernel.footprints.default
-footprints,default,hifive1@B,tests/benchmarks/footprints,,benchmark.kernel.footprints.default
+footprints,default,hifive1_revb,tests/benchmarks/footprints,,benchmark.kernel.footprints.default
 footprints,default,intel_ehl_crb,tests/benchmarks/footprints,,benchmark.kernel.footprints.default
 footprints,userspace,intel_ehl_crb,tests/benchmarks/footprints,-DCONF_FILE=prj_userspace.conf,benchmark.kernel.footprints.userspace
 footprints,power-management,frdm_k64f,tests/benchmarks/footprints,-DCONF_FILE=prj_pm.conf,benchmark.kernel.footprints.pm