sandbox: move compression option to Kconfig

CONFIG_BZIP2 and CONFIG_GZIP_COMPRESSED are Kconfig options. Select them
by CONFIG_SANDBOX instead of setting them in configs/sandbox.h.
Signed-off-by: NMichael Walle <michael@walle.cc>
Reviewed-by: NSimon Glass <sjg@chromium.org>

arch/Kconfig

@@ -86,6 +86,7 @@ config RISCV
 config SANDBOX
 	bool "Sandbox"
 	select BOARD_LATE_INIT
+	select BZIP2
 	select DM
 	select DM_GPIO
 	select DM_I2C
@@ -94,6 +95,7 @@ config SANDBOX
 	select DM_SERIAL
 	select DM_SPI
 	select DM_SPI_FLASH
+	select GZIP_COMPRESSED
 	select HAVE_BLOCK_DEVICE
 	select LZO
 	select OF_BOARD_SETUP

include/configs/sandbox.h

@@ -114,9 +114,6 @@
 	BOOTENV \
 	MEM_LAYOUT_ENV_SETTINGS
 
-#define CONFIG_GZIP_COMPRESSED
-#define CONFIG_BZIP2
-
 #ifndef CONFIG_SPL_BUILD
 #define CONFIG_SYS_IDE_MAXBUS		1
 #define CONFIG_SYS_ATA_IDE0_OFFSET	0