PM: EM: Documentation: Fix bug in example code snippet

A semicolon was mistakenly placed at the end of 'if' statements.

If example is copied as-is, it would lead to the subsequent return
being executed unconditionally, which is incorrect, and the rest of the
function would never be reached.

Signed-off-by: Patrick Little <plittle@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
[ rjw: Subject adjustment ]
Link: https://patch.msgid.link/20260128-documentation-fix-grammar-v1-2-39238dc471f9@gmail.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Author: pksublime

Documentation/power/energy-model.rst

@@ -308,12 +308,12 @@ EM framework::
   05
   06		/* Use the 'foo' protocol to ceil the frequency */
   07		freq = foo_get_freq_ceil(dev, *KHz);
-  08		if (freq < 0);
+  08		if (freq < 0)
   09			return freq;
   10
   11		/* Estimate the power cost for the dev at the relevant freq. */
   12		power = foo_estimate_power(dev, freq);
-  13		if (power < 0);
+  13		if (power < 0)
   14			return power;
   15
   16		/* Return the values to the EM framework */