gnupg2: switch optional dependency to libusb

gnupg2 migrated to libusb-1.0 in version 2.1.12.

Cc: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
(cherry picked from commit 65818acad6b419f8a595f804aa589dfc8a1f13a6)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/gnupg2/gnupg2.mk

@@ -42,10 +42,10 @@ else
 GNUPG2_CONF_OPTS += --disable-gnutls
 endif
 
-ifeq ($(BR2_PACKAGE_LIBUSB_COMPAT),y)
+ifeq ($(BR2_PACKAGE_LIBUSB),y)
 GNUPG2_CONF_ENV += CPPFLAGS="$(TARGET_CPPFLAGS) -I$(STAGING_DIR)/usr/include/libusb-1.0"
 GNUPG2_CONF_OPTS += --enable-ccid-driver
-GNUPG2_DEPENDENCIES += libusb-compat
+GNUPG2_DEPENDENCIES += libusb
 else
 GNUPG2_CONF_OPTS += --disable-ccid-driver
 endif