package/flashrom: libusb is optional, not mandatory

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 276ddad9f4efe275af3887cd30ac1432f7e96a68)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/flashrom/Config.in

@@ -1,8 +1,6 @@
 config BR2_PACKAGE_FLASHROM
 	bool "flashrom"
 	depends on BR2_i386 || BR2_x86_64
-	depends on BR2_TOOLCHAIN_HAS_THREADS # libusb
-	select BR2_PACKAGE_LIBUSB
 	help
 	  flashrom is a utility for identifying, reading, writing,
 	  verifying and erasing flash chips. It is designed to flash
@@ -11,7 +9,3 @@ config BR2_PACKAGE_FLASHROM
 	  programmer devices.
 
 	  http://flashrom.org/
-
-comment "flashrom needs a toolchain w/ threads"
-	depends on BR2_i386 || BR2_x86_64
-	depends on !BR2_TOOLCHAIN_HAS_THREADS

package/flashrom/flashrom.mk

@@ -7,7 +7,6 @@
 FLASHROM_VERSION = 1.0
 FLASHROM_SOURCE = flashrom-$(FLASHROM_VERSION).tar.bz2
 FLASHROM_SITE = https://download.flashrom.org/releases
-FLASHROM_DEPENDENCIES = libusb host-pkgconf
 FLASHROM_LICENSE = GPL-2.0+
 FLASHROM_LICENSE_FILES = COPYING
 
@@ -22,6 +21,13 @@ FLASHROM_MAKE_OPTS += \
 	CONFIG_USBBLASTER_SPI=no
 endif
 
+ifeq ($(BR2_PACKAGE_LIBUSB),y)
+FLASHROM_DEPENDENCIES += host-pkgconf libusb
+FLASHROM_MAKE_OPTS += CONFIG_ENABLE_LIBUSB1_PROGRAMMERS=yes
+else
+FLASHROM_MAKE_OPTS += CONFIG_ENABLE_LIBUSB1_PROGRAMMERS=no
+endif
+
 ifeq ($(BR2_PACKAGE_LIBUSB_COMPAT),y)
 FLASHROM_DEPENDENCIES += host-pkgconf libusb-compat
 FLASHROM_MAKE_OPTS += CONFIG_ENABLE_LIBUSB0_PROGRAMMERS=yes