crypto: ecc - expose ecc curves

commit 3eafeba15e64ede9eec897ec7f5d338735ddef30 from
git@git.assembla.com:cavium/WindRiver.linux.git

Move 'ecc_get_curve' to 'include/crypto/ecc_curve.h', so everyone
in kernel tree can easily get ecc curve params;

Signed-off-by: Meng Yu <yumeng18@huawei.com>
Reviewed-by: Zaibo Xu <xuzaibo@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Change-Id: I1b34922a51e90991460b02c6cf25b29ea3c965b0
Reviewed-on: https://sj1git1.cavium.com/c/IP/SW/kernel/linux/+/90098


Tested-by: sa_ip-sw-jenkins <sa_ip-sw-jenkins@marvell.com>
Reviewed-by: Nithin Kumar Dabilpuram <ndabilpuram@marvell.com>
Reviewed-by: Sunil Kovvuri Goutham <sgoutham@marvell.com>
Signed-off-by: Wenlin Kang <wenlin.kang@windriver.com>