Include 3rdparty directory into the main build-system.

Original author is unknown.
(Was either Juan Quintela or Jeff Garzik)

Signed-off-by: Luiz Fernando N. Capitulino <lcapitulino@mandriva.com.br>
Signed-off-by: Herton Ronaldo Krzesinski <herton@mandriva.com.br>
[Simplified for Mageia 7 / kernel 5.1.6 and up / tmb]
Signed-off-by: Thomas Backlund <tmb@mageia.org>

---
 Makefile           |    2 +-
 arch/arm/Kconfig   |    2 ++
 arch/arm64/Kconfig |    2 ++
 arch/x86/Kconfig   |    2 ++
 4 files changed, 7 insertions(+), 1 deletion(-)

diff -Nurp linux-5.12/arch/arm/Kconfig linux-5.12-3rd/arch/arm/Kconfig
--- linux-5.12/arch/arm/Kconfig	2021-04-25 23:49:08.000000000 +0300
+++ linux-5.12-3rd/arch/arm/Kconfig	2021-04-26 18:10:06.513775304 +0300
@@ -2016,3 +2016,5 @@ source "arch/arm/crypto/Kconfig"
 endif
 
 source "arch/arm/Kconfig.assembler"
+
+source "3rdparty/Kconfig"
diff -Nurp linux-5.12/arch/arm64/Kconfig linux-5.12-3rd/arch/arm64/Kconfig
--- linux-5.12/arch/arm64/Kconfig	2021-04-25 23:49:08.000000000 +0300
+++ linux-5.12-3rd/arch/arm64/Kconfig	2021-04-26 18:10:06.512775257 +0300
@@ -1959,3 +1959,5 @@ source "arch/arm64/kvm/Kconfig"
 if CRYPTO
 source "arch/arm64/crypto/Kconfig"
 endif
+
+source "3rdparty/Kconfig"
diff -Nurp linux-5.12/arch/x86/Kconfig linux-5.12-3rd/arch/x86/Kconfig
--- linux-5.12/arch/x86/Kconfig	2021-04-25 23:49:08.000000000 +0300
+++ linux-5.12-3rd/arch/x86/Kconfig	2021-04-26 18:10:06.512775257 +0300
@@ -2909,3 +2909,5 @@ source "drivers/firmware/Kconfig"
 source "arch/x86/kvm/Kconfig"
 
 source "arch/x86/Kconfig.assembler"
+
+source "3rdparty/Kconfig"
diff -Nurp linux-5.14/Makefile linux-5.14-3rd/Makefile
--- linux-5.14/Makefile
+++ linux-5.14-3rd/Makefile
@@ -670,7 +670,7 @@ endif
 ifeq ($(KBUILD_EXTMOD),)
 # Objects we will link into vmlinux / subdirs we need to visit
 core-y		:= init/ usr/ arch/$(SRCARCH)/
-drivers-y	:= drivers/ sound/
+drivers-y	:= drivers/ sound/ 3rdparty/
 drivers-$(CONFIG_SAMPLES) += samples/
 drivers-$(CONFIG_NET) += net/
 drivers-y	+= virt/