x86/sgx: Fix the return type of sgx_init()

mainline inclusion
from mainline-v5.12-rc1-dontuse
commit 31bf9288
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4SIGI


CVE: NA

--------------------------------

device_initcall() expects a function of type initcall_t, which returns
an integer. Change the signature of sgx_init() to match.

Intel-SIG: commit 31bf9288 x86/sgx: Fix the return type of sgx_init()
Backport for SGX Foundations support

Fixes: e7e05452 ("x86/sgx: Initialize metadata for Enclave Page Cache (EPC) sections")
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Darren Kenny <darren.kenny@oracle.com>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Link: https://lkml.kernel.org/r/20210113232311.277302-1-samitolvanen@google.com


Signed-off-by: Fan Du <fan.du@intel.com> #openEuler_contributor
Signed-off-by: Laibin Qiu <qiulaibin@huawei.com>
Reviewed-by: Bamvor Zhang <bamvor.zhang@suse.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>