sandbox: Add missing select's to the architecture symbol

As exposed by "make randconfig", we have an issues around a number of
symbols that we select without making sure to also select their
prerequisite symbols. Add these missing symbols.

Signed-off-by: Tom Rini <trini@konsulko.com>

arch/Kconfig

@@ -190,6 +190,7 @@ config SANDBOX
 	select HAVE_SETJMP
 	select HAVE_INITJMP
 	select ARCH_SUPPORTS_LTO
+	select AXI
 	select BOARD_LATE_INIT
 	select BZIP2
 	select CMD_POWEROFF if CMDLINE
@@ -199,24 +200,37 @@ config SANDBOX
 	select DM_GPIO
 	select DM_I2C
 	select DM_KEYBOARD
+	select DM_MAILBOX
+	select DM_RESET
 	select DM_SERIAL
 	select DM_SPI
 	select DM_SPI_FLASH
+	select GPIO
 	select GZIP_COMPRESSED
+	select I2C
 	select LZO
 	select MMC
 	select MTD
 	select OF_BOARD_SETUP
+	select OF_CONTROL
 	select PCI_ENDPOINT
+	select SANDBOX_RESET
 	select SPI
+	select SERIAL
 	select SUPPORT_OF_CONTROL
 	select SUPPORT_BIG_ENDIAN
 	select SUPPORT_LITTLE_ENDIAN
+	select SYSRESET
+	select SYSRESET_CMD_RESET
 	select SYSRESET_CMD_POWEROFF if SYSRESET && CMD_POWEROFF
 	select SYS_CACHE_SHIFT_4
 	select IRQ
 	select SUPPORT_EXTENSION_SCAN if CMDLINE
 	select SUPPORT_ACPI
+	select TIMER
+	select SPL_TIMER if SPL
+	select TPL_TIMER if TPL
+	select VPL_TIMER if VPL
 	imply BITREVERSE
 	select BLOBLIST
 	imply LTO