tcl/target: Unify Renesas R-Car JTAG reset config

Both Gen2 and Gen3 used the same init_reset{} implementation,
pull it into common file and include it from both generations.
Moreover, this behavior is SoC specific, not board specific,
so move the common init_reset into target/ directory.

Change-Id: I5489a4bff9a786da8cb7fd7a515b0c9ce9dc16e3
Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Reviewed-on: http://openocd.zylin.com/5400
Tested-by: jenkins
Reviewed-by: Oleksij Rempel <linux@rempel-privat.de>

tcl/board/renesas_salvator-xs.cfg

@@ -7,17 +7,3 @@ if { ![info exists SOC] } {
 	set SOC H3
 }
 source [find target/renesas_rcar_gen3.cfg]
-
-reset_config trst_and_srst srst_nogate
-
-proc init_reset {mode} {
-	# Assert both resets: equivalent to a power-on reset
-	adapter assert trst assert srst
-
-	# Deassert TRST to begin TAP communication
-	adapter deassert trst assert srst
-
-	# TAP should now be responsive, validate the scan-chain
-	jtag arp_init
-}
-

tcl/target/renesas_rcar_gen2.cfg

@@ -120,4 +120,6 @@ if { [string equal $_boot_core CA15] } {
 	setup_ca a7  $CA7_DBGBASE  $_num_ca7 0
 }
 
+source [find target/renesas_rcar_reset_common.cfg]
+
 eval "target smp $smp_targets"

tcl/target/renesas_rcar_gen3.cfg

@@ -166,4 +166,6 @@ if { [string equal $_boot_core CA57] } {
 	setup_a5x a53 $CA53_DBGBASE $CA53_CTIBASE $_num_ca53 0
 }
 
+source [find target/renesas_rcar_reset_common.cfg]
+
 eval "target smp $smp_targets"