Makefile/lib: add omapconf autoadjust_table

Autoadjust table is kinda a neat feature from omapconf. So,
we steal it here.

Original source is available here: https://github.com/omapconf/omapconf/

For example:

int show_voltage(...)
{
	char table[TABLE_MAX_ROW][TABLE_MAX_COL][TABLE_MAX_ELT_LEN];
	int row;
	char *name;
	float shunt, power, bus, current;
	/* .... logic to compute ... */

	autoadjust_table_init(table);
	row = 0;
	snprintf(table[row][0], TABLE_MAX_ELT_LEN, "%s Power Snapshot", name);
	row++;
	strncpy(table[row][0], "Bus (mV)", TABLE_MAX_ELT_LEN);
	strncpy(table[row][1], "Shunt (uV)", TABLE_MAX_ELT_LEN);
	strncpy(table[row][2], "Current (mA)", TABLE_MAX_ELT_LEN);
	strncpy(table[row][3], "Power (mW)", TABLE_MAX_ELT_LEN);
	row++;
	snprintf(table[row][0], TABLE_MAX_ELT_LEN, "%4.1f", bus / 1000);
	snprintf(table[row][1], TABLE_MAX_ELT_LEN, "%4.1f", shunt);
	snprintf(table[row][2], TABLE_MAX_ELT_LEN, "%4.1f", current);
	snprintf(table[row][3], TABLE_MAX_ELT_LEN, "%4.1f", power);
	row++;

	autoadjust_table_generic_fprint(stdout, table, row, 4,
					TABLE_HAS_SUBTITLE | TABLE_HAS_TITLE);
}

Results in the following output:
|---------------------------------------------------|
| VDD_MPU Power Snapshot                            |
|---------------------------------------------------|
| Bus (mV) | Shunt (uV) | Current (mA) | Power (mW) |
|---------------------------------------------------|
| 1062.5   | 637.5      | 1032.0       | 1087.5     |
|---------------------------------------------------|

Signed-off-by: Nishanth Menon <nm@ti.com>