s390: vmlinux.lds.S: Drop .hash and .gnu.hash for !CONFIG_PIE_BUILD

Sections .hash and .gnu.hash are only created when CONFIG_PIE_BUILD
option is enabled. Drop these for the case CONFIG_PIE_BUILD is disabled.

[ agordeev: Reworded the commit message ]

Fixes: 778666df

 ("s390: compile relocatable kernel without -fPIE")
Suggested-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Sumanth Korikkar <sumanthk@linux.ibm.com>
Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>