staging: rtl819x: select CONFIG_CRC32

Without crc32 support, the drivers fail to link:

ERROR: modpost: "crc32_le" [drivers/staging/rtl8192e/rtllib_crypt_wep.ko] undefined!
ERROR: modpost: "crc32_le" [drivers/staging/rtl8192e/rtllib_crypt_tkip.ko] undefined!
ERROR: modpost: "crc32_le" [drivers/staging/rtl8192u/r8192u_usb.ko] undefined!
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20210103214034.1995821-1-arnd@kernel.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192e/Kconfig

@@ -3,6 +3,7 @@ config RTLLIB
 	tristate "Support for rtllib wireless devices"
 	depends on WLAN && m
 	select LIB80211
+	select CRC32
 	help
 	  If you have a wireless card that uses rtllib, say
 	  Y. Currently the only card is the rtl8192e.

drivers/staging/rtl8192u/Kconfig

@@ -5,6 +5,7 @@ config RTL8192U
 	depends on m
 	select WIRELESS_EXT
 	select WEXT_PRIV
+	select CRC32
 	select CRYPTO
 	select CRYPTO_AES
 	select CRYPTO_CCM