kernel: fix some build paths

Kernel/cpu-armm0/rules.mk

@@ -1,18 +0,0 @@
-export CROSS_LD = xtensa-lx106-elf-ld
-export CROSS_CC = xtensa-lx106-elf-gcc
-# Do not use the Fedora gcc 5.3.1. It miscompiles stuff badly.
-export CROSS_CCOPTS=-c -g -Os -fno-strict-aliasing -fomit-frame-pointer -fno-builtin -Wall -I$(ROOT_DIR)/cpu-lx106 -I$(ROOT_DIR)/platform-$(TARGET) -I$(ROOT_DIR)/include -I$(ROOT_DIR) -mlongcalls -mforce-l32 -mforce-no-pic
-export CROSS_AS=$(CROSS_CC) $(CROSS_CCOPTS)
-export CROSS_CC_SEG1=
-export CROSS_CC_SEG2=
-export CROSS_CC_SEG3=
-# Fixme: we should split discard off
-export CROSS_CC_SEGDISC=
-export CROSS_CC_VIDEO=
-export CROSS_CC_FONT=
-export CROSS_CC_NETWORK=
-export ASOPTS=
-export ASMEXT = .S
-export BINEXT = .o
-export BITS = 32
-export EXECFORFMAT = elf32

Kernel/platform/platform-esp32/Makefile

@@ -72,7 +72,7 @@ all: $(OBJS)
 $(AOBJS): %.o: %.S
 	$(CROSS_AS) $(ASOPTS) -I.. $< -o $@
 
-$(OBJS): ../../kernel-esp32.def
+$(OBJS): ../../cpu-esp32/kernel-esp32.def
 
 $(COBJS): %.o: %.c
 	$(CROSS_CC) -I../../dev/ -I../../dev/net $(CROSS_CCOPTS) $< -o $@