Staging: rtl81xx: Fix build problems when CONFIG_CRYPTO=n

Select CONFIG_CRYPTO for all rtl81xx wireless drivers

... to avoid build problems like:

ERROR: "crypto_destroy_tfm" [drivers/staging/rtl8187se/r8187se.ko] undefined!
ERROR: "crypto_alloc_base" [drivers/staging/rtl8187se/r8187se.ko] undefined!
ERROR: "crypto_destroy_tfm" [drivers/staging/rtl8192u/r8192u_usb.ko] undefined!
ERROR: "crypto_alloc_base" [drivers/staging/rtl8192u/r8192u_usb.ko] undefined!
ERROR: "crypto_destroy_tfm" [drivers/staging/rtl8192su/r8192s_usb.ko] undefined!
ERROR: "crypto_alloc_base" [drivers/staging/rtl8192su/r8192s_usb.ko] undefined!
ERROR: "crypto_destroy_tfm" [drivers/staging/rtl8192e/r8192e_pci.ko] undefined!
ERROR: "crypto_alloc_base" [drivers/staging/rtl8192e/r8192e_pci.ko] undefined!

when drivers are built as modules but CONFIG_CRYPTO=n.
Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/rtl8187se/Kconfig

@@ -4,6 +4,7 @@ config R8187SE
 	select WIRELESS_EXT
 	select WEXT_PRIV
 	select EEPROM_93CX6
+	select CRYPTO
 	default N
 	---help---
 	  If built as a module, it will be called r8187se.ko.

drivers/staging/rtl8192e/Kconfig

@@ -3,5 +3,6 @@ config RTL8192E
 	depends on PCI && WLAN
 	select WIRELESS_EXT
 	select WEXT_PRIV
+	select CRYPTO
 	default N
 	---help---

drivers/staging/rtl8192su/Kconfig

@@ -4,5 +4,6 @@ config RTL8192SU
 	select WIRELESS_EXT
 	select WEXT_PRIV
 	select EEPROM_93CX6
+	select CRYPTO
 	default N
 	---help---

drivers/staging/rtl8192u/Kconfig

@@ -3,5 +3,6 @@ config RTL8192U
 	depends on PCI && WLAN && USB
 	select WIRELESS_EXT
 	select WEXT_PRIV
+	select CRYPTO
 	default N
 	---help---