mfd: bd9576: fix typos in comments

Various spelling mistakes in comments.
Detected with the help of Coccinelle.

Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
Reviewed-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20220314115354.144023-29-Julia.Lawall@inria.fr

drivers/mfd/rohm-bd9576.c

@@ -23,7 +23,7 @@ enum {
 };
 
 /*
- * Due to the BD9576MUF nasty IRQ behaiour we don't always populate IRQs.
+ * Due to the BD9576MUF nasty IRQ behaviour we don't always populate IRQs.
  * These will be added to regulator resources only if IRQ information for the
  * PMIC is populated in device-tree.
  */