iommupt: Actually correct pt_test_sw_bit_{acquire_release}() parameter description

iommupt: Actually correct pt_test_sw_bit_{acquire_release}() parameter description

In review comment for v1 of genpt documentation fixes [1], Randy
suggested that pt_test_sw_bit_acquire() parameters description
should be written using "to read". Commit e4dfaf25df1210 ("iommupt:
Describe @bitnr parameter"), however, misunderstood the review by
instead using "to read" on @bitnr parameter on both
pt_test_sw_bit_acquire() and pt_test_sw_bit_release().

Actually correct the description.

[1]: https://lore.kernel.org/linux-doc/9dba0eb7-6f32-41b7-b70b-12379364585f@infradead.org/

Fixes: e4dfaf25df1210 ("iommupt: Describe @bitnr parameter")
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>