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

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

[ Upstream commit 3a5351415228d06c988a1e610e71d3889f707ac9 ]

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
Stable-dep-of: 0d3e0dfd68fb ("x86/sgx: Fix size overflows in sgx_encl_create()")
Signed-off-by: Sasha Levin <sashal@kernel.org>