timer: fttmr010: return a previously deleted driver now ported to DM

The fttmr010 timer driver was deleted by
commit 29fc6f24926e ("ARM: remove a320evb board support")
The original source file was: arch/arm/cpu/arm920t/a320/timer.c

Return the driver to the codebase in a DM compatible form.
A platform using fttmr010 will be submitted later.

This hardware is described in the datasheet [1], starting from page 348.
According to the datasheet, there is a Revision Register at offset 0x3C,
which is not present in 'struct fttmr010'. Add it and debug() print
revision in probe function.

[1]
https://bitbucket.org/Kasreyn/mkrom-uc7112lx/src/master/documents/FIC8120_DS_v1.2.pdf

Signed-off-by: Sergei Antonov <saproj@gmail.com>
diff --git a/drivers/timer/Makefile b/drivers/timer/Makefile
index 3c92113..cdc20f5 100644
--- a/drivers/timer/Makefile
+++ b/drivers/timer/Makefile
@@ -13,6 +13,7 @@
 obj-$(CONFIG_$(SPL_)ATMEL_TCB_TIMER) += atmel_tcb_timer.o
 obj-$(CONFIG_CADENCE_TTC_TIMER)	+= cadence-ttc.o
 obj-$(CONFIG_DESIGNWARE_APB_TIMER)	+= dw-apb-timer.o
+obj-$(CONFIG_FTTMR010_TIMER)	+= fttmr010_timer.o
 obj-$(CONFIG_GXP_TIMER)		+= gxp-timer.o
 obj-$(CONFIG_MPC83XX_TIMER) += mpc83xx_timer.o
 obj-$(CONFIG_NOMADIK_MTU_TIMER)	+= nomadik-mtu-timer.o