thermal/drivers/qoriq: Fix getting tmu range

TMU Version 1 has 4 TTRCRs, while TMU Version >=2 has 16 TTRCRs.
So limit the len to 4 will report "invalid range data" for i.MX93.

This patch drop the local array with allocated ttrcr array and
able to support larger tmu ranges.

Fixes: f12d60c8

 ("thermal/drivers/qoriq: Support version 2.1")
Tested-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20240226003657.3012880-1-peng.fan@oss.nxp.com