ringtools/imy: fix duplicate definition of tdma_durations[] The bug was reported by Vadim Yanitskiy <fixeria@osmocom.org>, although the present fix is slightly different from the contributed patch: because main.c doesn't need this tdma_durations[] array at all, let's simply remove the reference to this array from main.c rather than turn it into an extern. I no longer remember my original thought flow that resulted (by mistake) in tdma_durations[] being multiply defined in main.c and durations.c. My intent might have been to define all globals in main.c and have the reference in durations.c be an extern - and I missed that extern - but without clear memory, I have no certainty. In any case, having this data array defined in the same module that fills it (durations.c) is sensible, so let's make it the new way.

	.text
	.globl	_entry
_entry:
	.code	16
	bx	pc
	nop

	.code	32
	stmfd	sp!, {r0-r12,lr}
	mrs	r0, CPSR
	mov	r1, sp
	/* supervisor mode, disable all interrupts */
	msr	CPSR_c, #0xd3
	ldr	sp, =stack_bottom
	/* save entry SP and CPSR */
	ldr	r2, =lldbg_entry_cpsr
	str	r0, [r2]
	ldr	r2, =lldbg_entry_sp
	str	r1, [r2]
	b	main