snagrecover: am6x: Support J721e platforms

[RomainNaour]

Support the J721e/DRA829/TDA4VM SoC family.

Its recovery flow is almost identical to the typical AM6x flow, the only major difference being an additional "sysfw.bin" binary firmware needed for "Split binary with a split firmware" boot flow [1] (like the AM654). Update send_tiboot3() accordingly to download "sysfw.bin" after "tiboot3.bin".

Add a new snagrecover template with all four binaries: tiboot3.bin, sysfw.itb, tispl.bin and u-boot.img.

Use USB Vendor ID and Product ID from the TDA4VM TRM in Table 4-66 USB Boot Parameter Table [2]:

Vendor ID = 0x451
Product ID = 0x6163

But latter in 4.6.8.1.1 DFU Device Mode chapter the Product ID is the same as the am65 SoC (0x6162). This is likely a typo since Product ID 0x6163 is the one used by u-boot for the J721e EVM board [3].

Add Product ID 0x6163 to the TI rules list.

Tested on SK-TDA4VM [4] board using its usb-c port by setting SW1 switch in USB boot mode, see the user manual [5].

[1] https://docs.u-boot.org/en/latest/board/ti/k3.html#boot-flow-variations
[2] https://www.ti.com/lit/zip/spruil1
[3] https://source.denx.de/u-boot/u-boot/-/blob/v2026.01/configs/j721e_evm_r5_defconfig#L177
[4] https://www.ti.com/tool/SK-TDA4VM
[5] https://www.ti.com/lit/pdf/SPRUJ21

[RomainNaour]

I checked other (newer) TI SoC about their "Product ID" value... and it's a mess.

Every time we have to double check the "Product ID" really used in u-boot. We can also check the CTRLMMR_USB_DEVICE_ID register reset value.

Here is my draft for other TI SoC (I reordered some lines, removed the "am654x" since it use the wrong device ID)

"am6x": {
	# K3 AM62x
	"am623": "0451:6165",
	"am625": "0451:6165",
	# K3 AM62a
	"am62a7": "0451:6165",
	# K3 AM62d
	"am62d2": "0451:6165",
	# K3 AM62p
	"am62p": "0451:6165",
	# K3 AM64xx
	"am6411": "0451:6165",
	"am6412": "0451:6165",
	"am6421": "0451:6165",
	"am6422": "0451:6165",
	"am6441": "0451:6165",
	"am6442": "0451:6165",
	# K3 AM654x
	"am6548": "0451:6162",
	"am6546": "0451:6162",
	# K3 J7200/DRA821
	"j7200": "0451:6164",
	# K3 J721e/DRA829/TDA4VM/AM68p
	"j721e": "0451:6163",
	# K3 J722S/TDA4VEN/TDA4AEN/AM67
	"am67": "0451:6165",
	# K3 J721S2/TDA4VE/TDA4AL/TDA4VL/AM68
	"am68": "0451:6168",
	# K3 J784S4/AM69x/TDA4VH/TDA4AH/TDA4VP/TDA4AP
	"am69": "0451:6168",
},

About SoC family naming "am6x", It should be "K3" to include other TI SoC using "K3 Multicore SoC architecture platform". Indeed not all TI SoC are named "AM6x": DRA829, DRA821, TDA4VM...

For the J721e, the "AM68p" variant doesn't really exist (it appear only in the TRM). It should not be confused with the "real" AM68 that is a "J721S2" SoC.

Do you really want a exhaustive list of SoC or can we use their "generic" names ? or have all variant name?

	# K3 J722S/TDA4VEN/TDA4AEN/AM67
	"j722s": "0451:6165",
	"tda4ven": "0451:6165",
	"tda4aen": "0451:6165",
	"am67": "0451:6165",