modules: hal_infineon: fix CMake Warning when build non Infineon device

Problem:
pull/43494 is causing the CMake warning
No SOURCES given to Zephyr library: modules_hal_infineon

modules_hal_infineon library was defined even if none of the
below subdirectories is added; so, when not building for
Infineon/Cypress devices, the source list for this library
will be empty.

Fix:
Added 'zephyr_library_named(modules_hal_infineon)' under condition
'if(CONFIG_HAS_XMCLIB OR CONFIG_SOC_FAMILY_PSOC6)'

Signed-off-by: Nazar Palamar <nazar.palamar@infineon.com>