fix: Makefile.local: add BL31 parameter

[chenxmqqqq]

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[RadxaYuntian]

你确定这些都需要定义BL31么？

[chenxmqqqq]

刚才补测了RK3576。

[chenxmqqqq]

rk3576 不加BL31的话，日志如下
Jumping to U-Boot(0x40200000)

U-Boot 2017.09-63-boot-rk2601-g1feef09260f-241129 # (Feb 13 2026 - 03:02:04 +0000)

Model: ROCK 4D
MPIDR: 0x0
PreSerial: 0, raw, 0x2ad40000
DRAM: 2 GiB
Sysmem: init
Relocation Offset: 7d904000
Relocation fdt: bb7f98c0 - bb7fecd8, kfdt: 40360000 - 14035ffff
CR: M/C/I
Using default environment

DM: v2
RESC: No bootdev
Failed to load DTB, ret=-19
No valid DTB, ret=-22
Failed to get kernel dtb, ret=-22
"Synchronous Abort" handler, esr 0x5e000000

• Reason: Exception from SMC instruction execution in AArch64 state
• PC = 0000000040200cf0
• LR = 0000000040273280
• SP = 00000000bb7f94f0
• ESR_EL3 = 000000005e000000
• Reloc Off = 000000007d904000

x0 : 0000000082000010 x1 : 0000000000000000
x2 : 0000000000000000 x3 : 0000000000000000
x4 : 0000000000000000 x5 : 0000000000000000
x6 : 0000000000000000 x7 : 0000000000000000
x8 : 0000000000000044 x9 : 000000000000000c
x10: 0000000000000000 x11: 0000000000001000
x12: 0000000000000003 x13: 000000004010f000
x14: 0000000000000000 x15: 0000000000000000
x16: 00000000bdb77214 x17: 00000000bb7f98b0
x18: 00000000bb7ffce8 x19: 00000000bb7f97d0
x20: 00000000bbb02090 x21: 00000000bb7f9778
x22: 00000000bbb05a50 x23: 00000000bbb05a58
x24: 0000000000000005 x25: 0000000040029493
x26: 000000004003f000 x27: 000000004002947b
x28: 0000000000000005 x29: 00000000bb7f96e0

其他板子的话是Jumping to U-Boot(0x40200000) 后直接无输出了