xr_usb_serial_common: replace SUBDIRS with M in package recipe

The SUBDIRS variable has been removed in kernel 5.4, and was deprecated
since the beginnig of kernel git history in favour of M or KBUILD_EXTMOD.

Signed-off-by: David Bauer <redacted>

diff --git a/libs/xr_usb_serial_common/Makefile b/libs/xr_usb_serial_common/Makefile
index a2091dfa9ea08b41905481322ae9daa634c2db16..b3797176d50dfca37b3999514d40d22fcfd7fe19 100644 (file)
--- a/libs/xr_usb_serial_common/Makefile
+++ b/libs/xr_usb_serial_common/Makefile
@@ -34,7 +34,7 @@ define Build/Compile
        +$(MAKE) $(PKG_JOBS) -C "$(LINUX_DIR)" \
                ARCH="$(LINUX_KARCH)" \
                CROSS_COMPILE="$(TARGET_CROSS)" \
-               SUBDIRS="$(PKG_BUILD_DIR)/xr_usb_serial_common-1a" \
+               M="$(PKG_BUILD_DIR)/xr_usb_serial_common-1a" \
                modules
 endef