ANDROID: virt: gunyah: Separate the gunyah_hypercall config symbol

Gunyah-aware confidential compute guest virtual machines don't need the
code to launch virtual machines, but still need to make hypercalls.
Split the gunyah_hypercall module into a separate Kconfig symbol which
can be selected by the guest module.

Bug: 395833312
Change-Id: Ic2ec7248bd7a85d09a4769b8d74090426b2f56b7
Signed-off-by: Elliot Berman <elliot.berman@oss.qualcomm.com>

arch/arm64/Kbuild

@@ -3,7 +3,7 @@ obj-y			+= kernel/ mm/ net/
 obj-$(CONFIG_KVM)	+= kvm/
 obj-$(CONFIG_XEN)	+= xen/
 obj-$(subst m,y,$(CONFIG_HYPERV))	+= hyperv/
-obj-$(CONFIG_GUNYAH)	+= gunyah/
+obj-$(CONFIG_GUNYAH_HYPERCALLS)	+= gunyah/
 obj-$(CONFIG_CRYPTO)	+= crypto/
 obj-$(CONFIG_MTK_GZVM)	+= geniezone/
 

arch/arm64/gunyah/Makefile

@@ -1,3 +1,3 @@
 # SPDX-License-Identifier: GPL-2.0
 
-obj-$(CONFIG_GUNYAH) += gunyah_hypercall.o
+obj-$(CONFIG_GUNYAH_HYPERCALLS) += gunyah_hypercall.o

drivers/virt/gunyah/Kconfig

@@ -1,11 +1,15 @@
 # SPDX-License-Identifier: GPL-2.0-only
 
+config GUNYAH_HYPERCALLS
+	tristate
+
 config GUNYAH
 	tristate "Gunyah Virtualization drivers"
 	depends on ARM64
 	select GUNYAH_PLATFORM_HOOKS
 	select AUXILIARY_BUS
 	imply GUNYAH_QCOM_PLATFORM if ARCH_QCOM
+	select GUNYAH_HYPERCALLS
 	help
 	  The Gunyah drivers are the helper interfaces that run in a guest VM
 	  such as basic inter-VM IPC and signaling mechanisms, and higher level