bsps: Move make/custom/* files to bsps

Adjust various build files.  Remove automatic generation of the
c/src/lib/libbsp/*/acinclude.m4 files from bootstrap script.

This patch is a part of the BSP source reorganization.

Update #3285.

bsps/arm/raspberrypi/config/raspberrypi.cfg

@@ -0,0 +1,7 @@
+#
+#  Config file for RASPBERRYPI
+#
+include $(RTEMS_ROOT)/make/custom/raspberrypi.inc
+
+CPU_CFLAGS = -mcpu=arm1176jzf-s
+

bsps/arm/raspberrypi/config/raspberrypi.inc

@@ -0,0 +1,20 @@
+#
+#  Config file for Raspberry Pi variants.
+#
+
+include $(RTEMS_ROOT)/make/custom/default.cfg
+
+RTEMS_CPU = arm
+
+CFLAGS_OPTIMIZE_V ?= -O2 -g
+CFLAGS_OPTIMIZE_V += -ffunction-sections -fdata-sections
+
+LDFLAGS = -Wl,--gc-sections
+
+# This defines the operations performed on the linked executable.
+# is currently required.
+define bsp-post-link
+    $(OBJCOPY) -O binary --strip-all \
+        $(basename $@)$(EXEEXT) $(basename $@)$(DOWNEXT)
+    $(SIZE) $(basename $@)$(EXEEXT)
+endef

bsps/arm/raspberrypi/config/raspberrypi2.cfg

@@ -0,0 +1,6 @@
+#
+#  Config file for RASPBERRYPI 2
+#
+include $(RTEMS_ROOT)/make/custom/raspberrypi.inc
+
+CPU_CFLAGS = -march=armv7-a -mthumb -mfpu=neon -mfloat-abi=hard -mtune=cortex-a7