hw/intc/Makefile.objs: Rename ARM7_NVIC to ARMV7M_NVIC

Signed-off-by: Ákos Kovács <akoskovacs@gmx.com>
hw/sparc/Kconfig: Kconfig for Sparc added

Signed-off-by: Ákos Kovács <akoskovacs@gmx.com>