psoc4: support for Cypress PSoC 41xx/42xx family

New NOR flash driver was derived from stm32lx.
Procedure ocd_process_reset_inner is overriden in psoc4.cfg
to handle reset halt and system ROM peculiarities.

Change-Id: Ib835324412d106ad749e1351a8e18e6be34ca500
Signed-off-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-on: http://openocd.zylin.com/2282
Tested-by: jenkins
Reviewed-by: Paul Fertser <fercerpav@gmail.com>

src/flash/nor/drivers.c

@@ -57,6 +57,7 @@ extern struct flash_driver mini51_flash;
 extern struct flash_driver nuc1x_flash;
 extern struct flash_driver nrf51_flash;
 extern struct flash_driver mrvlqspi_flash;
+extern struct flash_driver psoc4_flash;
 
 /**
  * The list of built-in flash drivers.
@@ -98,6 +99,7 @@ static struct flash_driver *flash_drivers[] = {
 	&nuc1x_flash,
 	&nrf51_flash,
 	&mrvlqspi_flash,
+	&psoc4_flash,
 	NULL,
 };