[PATCH] virt: sev-guest: fix kconfig warnings

[Randy Dunlap]

kconfig complains about unmet dependencies for SEV_GUEST
whenever CRYPTO is not set/enabled, so also select CRYPTO
when selecting other crypto kconfig options to silence the
warnings.

Quietens these warnings:

WARNING: unmet direct dependencies detected for CRYPTO_GCM
  Depends on [n]: CRYPTO [=n]
  Selected by [y]:
  - SEV_GUEST [=y] && VIRT_DRIVERS [=y] && AMD_MEM_ENCRYPT [=y]

WARNING: unmet direct dependencies detected for CRYPTO_AEAD2
  Depends on [n]: CRYPTO [=n]
  Selected by [y]:
  - SEV_GUEST [=y] && VIRT_DRIVERS [=y] && AMD_MEM_ENCRYPT [=y]

Fixes: fce96cf04430 ("virt: Add SEV-SNP guest driver")
Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Link: lore.kernel.org/r/202305300557.PJ5ao694-lkp@xxxxxxxxx
Cc: Brijesh Singh <brijesh.singh@xxxxxxx>
Cc: Paul Gazzillo <paul@xxxxxxxxx>
Cc: Necip Fazil Yildiran <fazilyildiran@xxxxxxxxx>
Cc: Tom Lendacky <thomas.lendacky@xxxxxxx>
Cc: linux-crypto@xxxxxxxxxxxxxxx
Cc: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
---
 drivers/virt/coco/sev-guest/Kconfig |    1 +
 1 file changed, 1 insertion(+)

diff -- a/drivers/virt/coco/sev-guest/Kconfig b/drivers/virt/coco/sev-guest/Kconfig
--- a/drivers/virt/coco/sev-guest/Kconfig
+++ b/drivers/virt/coco/sev-guest/Kconfig
@@ -2,6 +2,7 @@ config SEV_GUEST
 	tristate "AMD SEV Guest driver"
 	default m
 	depends on AMD_MEM_ENCRYPT
+	select CRYPTO
 	select CRYPTO_AEAD2
 	select CRYPTO_GCM
 	help