crypto: chelsio - un-register crypto algorithms

When a PCI device will be removed, cxgb4(LLD) will notify chcr(ULD).
Incase if it's a last pci device, chcr should un-register all the crypto
algorithms.
Signed-off-by: Devulapally Shiva Krishna <shiva@chelsio.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/chelsio/chcr_core.c

@@ -271,6 +271,8 @@ static int chcr_uld_state_change(void *handle, enum cxgb4_state state)
 
 	case CXGB4_STATE_DETACH:
 		chcr_detach_device(u_ctx);
+		if (!atomic_read(&drv_data.dev_count))
+			stop_crypto();
 		break;
 
 	case CXGB4_STATE_START_RECOVERY: