x86/sgx: Export sgx_encl_{grow,shrink}()

mainline inclusion
from mainline-6.0-rc1
commit 3a535141
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I5USAM


CVE: NA

Intel-SIG: commit 3a535141 x86/sgx: Export sgx_encl_{grow,shrink}().
Backport for SGX EDMM support.

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

In order to use sgx_encl_{grow,shrink}() in the page augmentation code
located in encl.c, export these functions.

Suggested-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Link: https://lkml.kernel.org/r/d51730acf54b6565710b2261b3099517b38c2ec4.1652137848.git.reinette.chatre@intel.com


Signed-off-by: Zhiquan Li <zhiquan1.li@intel.com>