Entries are first grouped as per SoC present on the board. Groups are
sorted alphabetically. This makes it easy to know SoC to board mapping
and also add new entries in alphabetical order.

Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
---
Based on top of linux-next + iot2050 m.2 board[1][2]

[1] lore.kernel.org/r/878e3a023767b5a6d9d2cff09015678aaba13fce.1674110442.git.jan.kiszka@siemens.com
[2] lore.kernel.org/r/20230119132958.124435-3-sabiya.d@ti.com

Here is what file looks like:
https://gist.github.com/r-vignesh/d54e6446b0615e0818c142d9ea152e27

 arch/arm64/boot/dts/ti/Makefile | 36 +++++++++++++++++++++------------
 1 file changed, 23 insertions(+), 13 deletions(-)

diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
index 74c71d25e406..6acd12409d59 100644
--- a/arch/arm64/boot/dts/ti/Makefile
+++ b/arch/arm64/boot/dts/ti/Makefile
@@ -5,33 +5,43 @@
 #
 # Copyright (C) 2016-2021 Texas Instruments Incorporated - https://www.ti.com/
 #
+# Entries are grouped as per SoC present on the board. Groups are sorted
+# alphabetically.
 
-dtb-$(CONFIG_ARCH_K3) += k3-am654-base-board.dtb
+# Boards with AM62x SoC
+dtb-$(CONFIG_ARCH_K3) += k3-am625-sk.dtb
+
+# Boards with AM62Ax SoC
+dtb-$(CONFIG_ARCH_K3) += k3-am62a7-sk.dtb
+
+# Boards with AM64x SoC
+dtb-$(CONFIG_ARCH_K3) += k3-am642-evm.dtb
+dtb-$(CONFIG_ARCH_K3) += k3-am642-phyboard-electra-rdk.dtb
+dtb-$(CONFIG_ARCH_K3) += k3-am642-sk.dtb
+
+# Boards with AM65x SoC
 dtb-$(CONFIG_ARCH_K3) += k3-am6528-iot2050-basic.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am6528-iot2050-basic-pg2.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am6548-iot2050-advanced.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am6548-iot2050-advanced-m2.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am6548-iot2050-advanced-pg2.dtb
+dtb-$(CONFIG_ARCH_K3) += k3-am654-base-board.dtb
 
-DTC_FLAGS_k3-am6548-iot2050-advanced-m2 += -@
-
-dtb-$(CONFIG_ARCH_K3) += k3-am68-sk-base-board.dtb
+# Boards with J7200 SoC
+dtb-$(CONFIG_ARCH_K3) += k3-j7200-common-proc-board.dtb
 
+# Boards with J721e SoC
 dtb-$(CONFIG_ARCH_K3) += k3-j721e-beagleboneai64.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-j721e-common-proc-board.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-j721e-sk.dtb
 
-dtb-$(CONFIG_ARCH_K3) += k3-j7200-common-proc-board.dtb
-
+# Boards with J721s2 SoC
+dtb-$(CONFIG_ARCH_K3) += k3-am68-sk-base-board.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-j721s2-common-proc-board.dtb
 
+# Boards with J784s4 SoC
 dtb-$(CONFIG_ARCH_K3) += k3-am69-sk.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-j784s4-evm.dtb
 
-dtb-$(CONFIG_ARCH_K3) += k3-am642-evm.dtb
-dtb-$(CONFIG_ARCH_K3) += k3-am642-phyboard-electra-rdk.dtb
-dtb-$(CONFIG_ARCH_K3) += k3-am642-sk.dtb
-
-dtb-$(CONFIG_ARCH_K3) += k3-am625-sk.dtb
-
-dtb-$(CONFIG_ARCH_K3) += k3-am62a7-sk.dtb
+# Enable support for device-tree overlays
+DTC_FLAGS_k3-am6548-iot2050-advanced-m2 += -@
-- 
2.39.1