src.opts.mk: Enable LLDB for 32-bit arm

It was previously disabled when we built for older 32-bit arm targets
which lack 64-bit atomics.  As we now support armv7 at a minimum there
is no need to disable LLDB.

Sponsored by:	The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D52668

share/man/man5/src.conf.5

@@ -1,5 +1,5 @@
 .\" DO NOT EDIT-- this file is @generated by tools/build/options/makeman.
-.Dd October 1, 2025
+.Dd October 22, 2025
 .Dt SRC.CONF 5
 .Os
 .Sh NAME
@@ -956,12 +956,12 @@ Do not build LLVM's lld linker.
 Do not build the LLDB debugger.
 .Pp
 This is a default setting on
-arm/armv7 and riscv/riscv64.
+riscv/riscv64.
 .It Va WITH_LLDB
 Build the LLDB debugger.
 .Pp
 This is a default setting on
-amd64/amd64, arm64/aarch64, i386/i386, powerpc/powerpc64 and powerpc/powerpc64le.
+amd64/amd64, arm/armv7, arm64/aarch64, i386/i386, powerpc/powerpc64 and powerpc/powerpc64le.
 .It Va WITHOUT_LLD_BOOTSTRAP
 Do not build the LLD linker during the bootstrap phase of
 the build.

share/mk/src.opts.mk

@@ -302,7 +302,7 @@ __DEFAULT_NO_OPTIONS+=FDT
 __DEFAULT_YES_OPTIONS+=FDT
 .endif
 
-.if ${__T:Marm*} == "" && ${__T:Mriscv64*} == ""
+.if ${__T:Mriscv64*} == ""
 __DEFAULT_YES_OPTIONS+=LLDB
 .else
 __DEFAULT_NO_OPTIONS+=LLDB