staging: r8188eu: binstallGrpkey is set to _FAIL

The variable binstallGrpkey is set to _FAIL which is defined as 0.
Use false to set the variable to get rid of another use of _FAIL.

Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com> # Edimax N150
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20221111083733.3144-5-straube.linux@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/os_dep/os_intfs.c

@@ -405,7 +405,7 @@ static void rtw_init_default_value(struct adapter *padapter)
 	pmlmepriv->htpriv.ampdu_enable = false;/* set to disabled */
 
 	/* security_priv */
-	psecuritypriv->binstallGrpkey = _FAIL;
+	psecuritypriv->binstallGrpkey = false;
 	psecuritypriv->sw_encrypt = pregistrypriv->software_encrypt;
 	psecuritypriv->sw_decrypt = pregistrypriv->software_decrypt;
 	psecuritypriv->dot11AuthAlgrthm = dot11AuthAlgrthm_Open; /* open system */