rename some target scripts to be consistent with the rest

Rename Atmel target scripts which had wrong name ("at91" missing for ARM7 AT91SAM7..., "at" missing for AVR ATmega...)

Signed-off-by: Freddie Chopin <freddie_chopin@op.pl>

tcl/target/at91sam7x256.cfg

@@ -0,0 +1,50 @@
+#use combined on interfaces or targets that can't set TRST/SRST separately
+reset_config srst_only srst_pulls_trst
+
+if { [info exists CHIPNAME] } {
+   set  _CHIPNAME $CHIPNAME
+} else {
+   set  _CHIPNAME sam7x256
+}
+
+if { [info exists ENDIAN] } {
+   set  _ENDIAN $ENDIAN
+} else {
+   set  _ENDIAN little
+}
+
+if { [info exists CPUTAPID ] } {
+   set _CPUTAPID $CPUTAPID
+} else {
+   set _CPUTAPID 0x3f0f0f0f
+}
+
+jtag newtap $_CHIPNAME cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_CPUTAPID
+
+set _TARGETNAME $_CHIPNAME.cpu
+target create $_TARGETNAME arm7tdmi -endian $_ENDIAN -chain-position $_TARGETNAME -variant arm7tdmi
+
+$_TARGETNAME configure -event reset-init {
+	# disable watchdog
+	mww 0xfffffd44 0x00008000
+	# enable user reset
+	mww 0xfffffd08 0xa5000001
+	# CKGR_MOR : enable the main oscillator
+	mww 0xfffffc20 0x00000601
+	sleep 10
+	# CKGR_PLLR: 96.1097 MHz
+	mww 0xfffffc2c 0x00481c0e
+	sleep 10
+	# PMC_MCKR : MCK = PLL / 2 ~= 48 MHz
+	mww 0xfffffc30 0x00000007
+	sleep 10
+	# MC_FMR: flash mode (FWS=1,FMCN=60)
+	mww 0xffffff60 0x003c0100
+	sleep 100
+}
+
+$_TARGETNAME configure -work-area-phys 0x00200000 -work-area-size 0x4000 -work-area-backup 0
+
+#flash bank <driver> <base_addr> <size> <chip_width> <bus_width> <target_number> [<target_name> <banks> <sectors_per_bank> <pages_per_sector> <page_size> <num_nvmbits> <ext_freq_khz>]
+set _FLASHNAME $_CHIPNAME.flash
+flash bank $_FLASHNAME at91sam7 0 0 0 0 $_TARGETNAME 0 0 0 0 0 0 0 18432