s390/configs: move CONFIG_DEBUG_INFO_BTF into btf.config addon config

CONFIG_DEBUG_INFO_BTF significantly increases compile time for the
kernel. E.g. when changing a single C file compile time for a new bzImage
is increased by ~50% if BTF debug info is generated.

Therefore remove CONFIG_DEBUG_INFO_BTF from all defconfigs and introduce a
btf.config addon config file. Quickly enabling CONFIG_DEBUG_INFO_BTF into
the current kernel config can be done by simply invoking

make btf.config

Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>

arch/s390/configs/btf.config

@@ -0,0 +1 @@
+CONFIG_DEBUG_INFO_BTF=y

arch/s390/configs/debug_defconfig

@@ -797,7 +797,6 @@ CONFIG_CMA_SIZE_MBYTES=0
 CONFIG_PRINTK_TIME=y
 CONFIG_DYNAMIC_DEBUG=y
 CONFIG_DEBUG_INFO_DWARF4=y
-CONFIG_DEBUG_INFO_BTF=y
 CONFIG_GDB_SCRIPTS=y
 CONFIG_HEADERS_INSTALL=y
 CONFIG_DEBUG_SECTION_MISMATCH=y

arch/s390/configs/defconfig

@@ -781,7 +781,6 @@ CONFIG_CMA_SIZE_MBYTES=0
 CONFIG_PRINTK_TIME=y
 CONFIG_DYNAMIC_DEBUG=y
 CONFIG_DEBUG_INFO_DWARF4=y
-CONFIG_DEBUG_INFO_BTF=y
 CONFIG_GDB_SCRIPTS=y
 CONFIG_DEBUG_SECTION_MISMATCH=y
 CONFIG_MAGIC_SYSRQ=y

arch/s390/configs/zfcpdump_defconfig

@@ -74,7 +74,6 @@ CONFIG_PRINTK_TIME=y
 # CONFIG_SYMBOLIC_ERRNAME is not set
 CONFIG_DEBUG_KERNEL=y
 CONFIG_DEBUG_INFO_DWARF4=y
-CONFIG_DEBUG_INFO_BTF=y
 CONFIG_DEBUG_FS=y
 CONFIG_PANIC_ON_OOPS=y
 # CONFIG_SCHED_DEBUG is not set