imx: Fix critical thermal threshold

Fix the critical thermal threshold for i.MX processors, this was changed
while moving the code from imx8m/imx9 directories into a shared place.

There is no need to keep the critical threshold 5 degrees less than the
SoC maximum temperature threshold, what is actually going to happen in
practice is that we are going to power-off the board when the SoC is
still within its working temperature range.

In addition to that this is a change in the actual behavior, that is
introducing a regression to users, and it was hidden within a software
refactoring.

Fixes: d0fe80890ab1 ("imx: Generalize fixup_thermal_trips")
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
diff --git a/arch/arm/mach-imx/fdt.c b/arch/arm/mach-imx/fdt.c
index ac782e3..103c1fc5 100644
--- a/arch/arm/mach-imx/fdt.c
+++ b/arch/arm/mach-imx/fdt.c
@@ -115,7 +115,7 @@
 
 		temp = 0;
 		if (!strcmp(type, "critical"))
-			temp = 1000 * (maxc - 5);
+			temp = 1000 * maxc;
 		else if (!strcmp(type, "passive"))
 			temp = 1000 * (maxc - 10);
 		if (temp) {