powerpc/pseries/eeh: move pseries_eeh_err_inject() outside CONFIG_DEBUG_FS block

powerpc/pseries/eeh: move pseries_eeh_err_inject() outside CONFIG_DEBUG_FS block

Makes pseries_eeh_err_inject() available even when debugfs
is disabled (CONFIG_DEBUG_FS=n). It moves eeh_debugfs_break_device()
and eeh_pe_inject_mmio_error() out of the CONFIG_DEBUG_FS block
and renames it as eeh_break_device().

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202409170509.VWC6jadC-lkp@intel.com/
Fixes: b0e2b828dfca ("powerpc/pseries/eeh: Fix pseries_eeh_err_inject")
Signed-off-by: Narayana Murty N <nnmlinux@linux.ibm.com>
Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240917132445.3868016-1-nnmlinux@linux.ibm.com